Huawei HCIE-Datacom H12-891_V1.0 Exam Dumps

dumps2022-05-13T02:13:10+08:00

H12-891_V1.0 exam is one related test for Huawei HCIE-Datacom certification, which is an upgrade certification of HCIE Routing & Switching. There are 60 questions in real Huawei H12-891_V1.0 exam, and you have 90 minutes to finish the test. The required passing score of Huawei H12-891_V1.0 exam is 600. The test languages are Chinese and English. We provide the latest Huawei HCIE-Datacom H12-891_V1.0 exam dumps, which can guarantee you pass. Free Huawei certification H12-891_V1.0 exam dumps are below.

Page 1 of 19

1. The DHCP protocol assigns to clients―some TCPIP-related parameter information―in the process DHCP defines a variety of messages that are encapsulated at the transport layer: (sortic).

PPP package

IP encapsulation

TCP Encapsulation

UDP Encapsulation

2. In different scenarios, RSTP provides different protection functions, and the wrong statement about this statement is

The root protection feature is enabled for the specified port, and its port role can only remain as the specified port

When the anti-TC-BPDU packet attack feature is enabled, the number of times the switching device processes IC BPDU packets per unit time is configurable

after the BPDU protection function is enabled on the switching device, if the edge port receives RST BPDU, the edge port will be set to a non-remote port and the spanning tree calculation will be re-performed

Start the specified port of root protection, when the port receives a better RSTBPDU, the port will enter the Discarding state and is no longer forwarding packets. If the port does not receive a better RSTBPD for a period of time then automatically revert to the normal Forwarding state

3. In a VXLAN network, traffic is connected to the VXLAN network, and it can also be used to communicate with the same subnet within the same XLAN network

NVE interface

VXVAN L2 Gateway

VXLAN L3 Gateway

VLANIF interface

4. SSH uses asymmetric encryption algorithms AES and DES to achieve security for data transmission, and uses HMAC to ensure the complete integrity of integer data

TRUE

FALSE

5. Which of the following IEEE standards is specific to Gigabit Ethernet?

8023z

8023ab

8023ad

8023af

6. The BSR/RP mechanism described below describes the correct determination? (Multiple choice questions).

There can be multiple C-BSRs in the

PIM-SM domain, but only one BSR can be elected.

BSR collects C-RP information by receiving packets of C-RP

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain via flood bootstrap messages

A C-BSR can also collect C-RP information by receiving C-RP packets

7. MSTP switches treat RSTP switches as MSTP domains, MSTP, which are formed by a single switch The interchange resolves the RSTBPDU to MSTBPDU, where IRPC is 0

True

False

8. CMPv6 uses the Type field to identify the message type, and according to the value of the type field, we can divide the ICMPv6 message into two categories, one is the error message and the other is the information message

True

False

9. As a network administrator, which of the following protocols can I use for network device configuration?

SSH

NETCONF

LLDP

SNMP

10. How do 8021w and 8021D handle BPDUs? (Confirmed) The

8021D bridge only forwards BPDU packets received from the root bridge

The 8021D bridge does not forward BPDU messages

The 8021w bridge forwards only BPDU packets received from the root bridge

8021w Bridge does not forward BPDU packet

Page 2 of 19

11. After BGP introduces routes for other protocols, the next hop in the BGP routing table is consistent with the next hop of the introduced routing protocol

True

False

12. If the Option field value in the 0SPFv3 Hello message issued by the router's GIgabit Ethermet0/0 interface is 0x000013, the following description is correct

The Gigabit/thernetO/0/0 interface of Router A adds IPv6 routing to compute

Router A's Gigabit/thernetO/0/0 interface belongs to the NSSA zone

Router A supports AS-An External-LSA flood

Router A is an OSPFv3 device with forwarding capability

13. The following description of the link state protocol is plausible?

CPU utilization is high and loops are easy to generate

Slow convergence and low CPU utilization

Fast convergence and low CPU utilization

Fast convergence and high CPU utilization

14. CORRECT TEXT

The following description of Filter-Policy is correct? (Radio).

A With Filter-Policy, on ASBR in OSPF, type5LSA and type7LSA can be applied The build is filtered.

B. Prefix lists can be used to filter both routes and packets.

C. Filter-policy filters the link state information received or published, and can modify the properties of route entries.

D. When filtering routes using the pre-slow list, the table entry ip-prefxldeny0000 0 lese-qual 32 indicates that only the default route matches

15. Which of the following messages does the BGP protocol support?

Update

Open

Hello

Keepalive

16. Is the following description of ospf virtual links correct?

A virtual connection can be established in any area, after which it itself belongs to the region

The virtual connection ip is used as the link address

Virtual links can be used to solve the problem of zone 0 being segmented

The cost of a virtual connection is zero and is the optimal link

17. XLAN uses BGP EVPN to establish a tunnel, what type of message is used? (Single choice questions).

Typel

Type2

Type3

Type4

Type5

18. In RSTP, which port provides a backup path to reach the root node of the spanning tree?

What state is the port in?

Root Port and Listening Status

Alternate Port and Forwarding Status

Alternate Port and Learning Status

Designated port and Listening status

Alternate port and Discarding status

19. IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select

When the group shake source sends IP6 multicast data, the TTL value of the packet is set to limit the transmission range of the group shake

There is a special field in the IPv6 multicast address that specifies the propagation range of multicast.

Multicast scope is just a concept of spreading scope, and there is no specific technical implementation.

During network configuration, the administrator uses the configuration command at the edge of the network to limit the multicast scope.

20. If a DR needs to be elected between multicast routers running PIM-SM to be responsible for the sending and receiving of source or member multicast data, which one is described correctly below for the DR election rule?

PIM routers with long interface masks are elected dr.

Compare the DR priority first; With the same priority, you need to compare the interface IP addresses of the PIM routers to elect dr

PIM routers with small IP addresses are elected D

PIM routers with low

DR priority values are elected D

Page 3 of 19

21. For Layer 2 VPN technology, the following statement is correct? Multi-select

VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.

The VPLS configuration is complex and the Layer 2 network transmits BUM packets.

BGPEVPN supports features such as tenant isolation, Multi-homing, and broadcast suppression.

BGPEVPN addresses mac address drift and multi-tenancy that VPLS cannot support.

22. The following statement about the alliance is correct? (Single choice questions).

The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS

Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems

Consortium can easily detect the routing loop within the AS because EBGP is running between the subA

The subas number of the consortium, which by default notifies BGP peers outside the consortium

23. After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs .

Which of the following is not a configurable action?

Send an alert

The MAC address blocks

Interface blocking

Traffic filtering

24. In the use of the CP protocol, the following description is correct?

The Eth-Trunk interface can be avoided by frequent oscillation interfaceeth-trunkllacppreemptenablelacppreemptdelaydelay-time by following command

Source A address can be configured for load sharing in an enabled link aggregation group with the following command: interface eth-trunk 110ad-balance src-dst-ip

A member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 undo eth-trunk 1 interfaceGigabitEthernet0/0/1undoshutdown

The member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 trunkport

25. ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct? (Multiple choice)

ISIS elects dis by comparing priorities, and mac addresses if the priorities are consistent

In a broadcast multiple access network, DIS sends Hello PDUs at three times the frequency

DIS guarantees database synchronization by periodically sending CSNP messages

DIS supports preemption function, after the new DIS preemption is successful, there is no need to flood any LSP packet

26. A switch joins a running stacking system after powering up, a behavior known as heap overlay.

TRUE

FALSE

27. In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct

ASBR-Sunmary-LSA is allowed to be published to the NSSA region

AS-External-LSA is allowed to be published to the Stub region

Any OSPF zone can be configured as a special zone

Zone can be equipped with zhiyi

28. What of the following actions can enable fast failure detection on multicast networks?

Shorten the Holdtime of Join/Prune messages

Reduce the interval at which the interface sends Hello messages

A PIM BFD session is established between neighbors

Reduce the interval between sending Join/Prune messages

29. Router HW enables OSPF and router HW has the role of ABR and is configured with abr-summary, then which class LSA Will it be aggregated?

1 Class LSA

2 kind LSA

3 kind LSA

4 kind LSA

5 Class LSA

30. There is an As-path-filter.ip as-path-filter 1 permit*(100l400) $, which As-path-filter can match which of the following AS_PATH Attribute? (Confirmed).

300 4200

1234 1400

3100

100

Page 4 of 19

31. CORRECT TEXT

The following about BGP routing, describing the error, is?

A, non-aggregate routes take precedence over aggregate routes

B. In PrefVal, Local_ Preference is equal to the case if the route is generated locally, IBGP Routing, the BGP preference for EBGP routing, is generated effectively referring to route priority.

C. See the following entry in the BGP routing table:* 172161.11/32 000010 0? Indicates that the route is available non-optimal

D. For next_hop unreachable routes when invalid routes, do not participate in the preferred.

32. The switch can suppress traffic by suppressing traffic and extremely other failures can affect operations, which of the following traffic suppression configurations is the wrong configuration

[Quidway] wan 10 [Quidway-wan10] multicast-suppression 1000 [Quidway-van10] quit

[Qudway ineface gigabtethemnet /0'1 [Quidway-GigabitEfthemetO0/O/1]multicast-suppression 80TQuidway- GigabitEthernet0/0/1]quit

Quidway inteface gigabiethenet ou0/1 [Quidway-GigabtEthernet/0/1J,broadcast-suppression 80 IQuidway-GigabitEthernet//1]Jqut

[Quidway] icmp rate-limit enable [Quidway] icmp rate-limit total threshold 20

[Quidway ] wan 10 [Quidway-wani0] broadcast-suppression 1000 [Quidway-van10] quit

33. The following description of the characteristics of multi-instance CE is?

Since the MCE device is already bound to the VPN, there is no need to bind the VPN on the PE connected to the MCE device

The MCE device can determine the source of the routing information according to the interface that receives the routing information, and maintain it in the route forwarding table of the corresponding V

MCE is implemented by creating their own routing forwarding tables for different VPNs on the MCE device and binding to the corresponding interface o

Configuring MCE enables a CE to connect to multiple VPNs at the same time, which can not only completely isolate the service between different VPN users, but also reduce the input cost of network equipment.

34. When a Layer 3 switch sends IP packets originating from one VLAN to another LAN, which field in the following options is overridden? (Single choice questions).

Three layers of TTL

Layer 3 destination address

Layer 3 source address

Layer 3 Transport Protocol

Two-tier TTL

35. A home user has opened a 1Mb/s bandwidth, and in order to improve the user experience, the operator can stabilize 2Mb/s when measuring speed If we use the listening bucket technology to achieve this requirement, which of the following methods is optimal.

cir 10000 pir 12000

cir 10o00 cbs 12000 pbd 12000

cir 8000 pir 12000

cir 10000 cbs 10000 pbs 12000

36. What is the wrong description of the function of OSPFv3 protocol authentication?

OSPFv3 can only establish a security alliance SA using manual mode

Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode

OSPFv3 authentication relies on IPv6 packet authentication headers and encapsulation security net load headers

The OSPFv3 protocol header removes the Type and Automation fields

37. A VRRP virtual router configuration VRID is 3 and the virtual IP address is 100 1. 1. 10, so what is the virtual MAC address?

O0-00-5E-00-01-64

01-00-5E-00-01-03

01-00-5E-00-01-54

00-00-5E-00-01-03

38. To implement the traffic filtering function, you can use trapp-filter or MQC, which can be called in more views than traffic-filter

FALSE

TRUE

39. BGP routing policies can control the publication and acceptance of routes

TRUE

FLASE

40. The following statement about the NSSA area is correct (multiple choice).

In the NSSA area where the OSPF neighbor sends hello packets, the N position 0, E within the option field Position 1

The NSSA zone must automatically generate a default LSA to access the external network

The NSSA zone generates a Category VII LSA to advertise external routing, and the FA address in the Category VII LSA acts to prevent loops

In the OSPF neighbor in the NSSA region sends hello packets, position 1 within the option field, position E

Page 5 of 19

41. Protocols with TCP ports 443, 179, 137, 110, and 23 are, in order: radio

Finger,DHCP Server,NetBios Name Server,POP3,TelnetB

LDAP,SNMP,TFTP,POP3,Telnet

HTTPS,SNMP,POP3,DNS ,Telnet

HiPS,BGP, NetBios Name Server ,POP3,Telnet

BGP,POP3,SNMP,TFTP,Teinet

42. The following statement about IS-IS (IPv6) is correct?

In order to support the processing and calculation of IPv6 routes, IS-IS has added TLV232 and 236

By default, IS-IS has the multi-topology feature turned on

IS-IS works at the data link layer and only needs to add a new TLV to support IPv6

In order to support the processing and calculation of IPv6 routes, IS-IS has added NLPID to the 129 TLV

43. The following description of the TTL in the MPLS Header is correct:

A TTL that acts like an IP header and is used to prevent message loops

To control label distribution

Limit LSR

Control of upstream devices for label distribution

44. What are the following correct statements about MUX VLANs? (Multiple select).

The Principal VLAN can communicate with all VLANs within the MUX VLAN

Each Separate VLAN must be bound to a Principal VLAN

Separate VLANs can communicate with all VLANs within a MUX VLAN

Each Group VLAN must be bound to a Principal VLAN

45. Regarding the FTP protocol, which of the descriptions below is correct?

In FTP Passive mode, the client completes the initialization of the TCP session for control and data

In FTP Active mode, the server tells the client which port it expects to send data on by commanding "PORT"

FTP always uses a TCP session to transmit control information and data information

FTP always uses TCP port 20 to establish a data session, and ICP port 21 to establish control will always use

FTP TCP port 21 to establish a data session, TCP port 20 to establish a control session

46. Router HW cannot access hosts in the remote network, router HW runs routing protocols and only pings the remote file server address 105401 on router HW with extensions

through a default route remote network, the result of ping on the router HW is rendered as 'requ.' est time out', according to the above description, the error in the following analysis is?

The next hop router for router HW did not reach the destination address

Router HW does not have a legitimate router to reach the destination address

Ping is successful, but congestion occurs on the path to the destination address

There is a firewall in the remote destination network, and the destination address can be reached without releasing ICMP traffic

ICMP packets, but the destination device fails to reply

47. If the receive cache of a switch's gigabit Ethernet interface is full, what protocol does the switch use to know that the remote interface delays sending data frames for a period of time?

8023af

8021U

8021D

8023

8023Z

48. A multi-protocol network, the topology is shown in the figure. Take a closer look at the topology, router R4 (in Areal) is introduced into the OSPF process via the routes learned by BGP. So what categories of LS4 will R3 advertise to zone 0? (Multiple choice questions).

5?LSA

7?LSA

1?LSA

4?LSA

2????

49. Link state information is isolated by default between different IS-IS processes on the same router.

TRUE

FALSE

50. In VXLAN scenarios, what features can be turned on to reduce flooding of ARP messages between VTEPs? (Multiple select).

Host Information Collection

Local ARP agent

port isolation

ARP broadcast suppression

Page 6 of 19

51. 100000destination-porteq 23 rule 1l0 deny ip source any destination any Then you apply that ACL to the ingress direction of the router's seial interface .

What type of message is allowed to pass through the router? (Multiple choice questions).

A non-sharded, port 21-accessing packet

Non-first-sharded messages that use port 23 to access the server's message

Non-first-of-sharded messages to access other hosts

Non-first-of-its-kind packets that use port 21 to access the server

Packet answer for the first sharded or non-sharded, using port 23 to access the server

52. What are the types of link types included in OSPF's route LSA?

Stubnet

P-2-P

VLINK

Fransnet

53. Off-stem cross-domain VPN-Option B scenario, the following description is incorrect?

During the packet forwarding process, it is necessary to exchange the VPN's private network LSP on the

two ASBRs IP-EBGP neighbor relationships.

The cross-domain VPN-Option B scheme is not limited by the number of interconnection links between ASBRs

The outer layer tag is exchanged between two ASBRs to vpnV4 routes.

54. Regarding the description of the BGP neighbor, the error is:

BGP routers that support autodiscovery neighbors

BGP establishing neighbors must be configured with MD5 authentication

BGP needs to establish a UDP connection before establishing a neighbor

BGP to establish a neighbor relationship needs to first interact with the link state information

55. A lot of overwave techniques have emerged in the process of replacing the IPV4 addresses used in the network with lP6 addresses. These technologies are divided into two categories, one is IP4IPV6 coexistence technology, the other is PA/IP>6 interoperability technology, which of the following options sleep in IPv4/IPv6 coexistence technology?

NAT64

IPv6 over IPv4

Dual Stack

ISATAP

56. The following is an error in the OSPF routing calculation (single choice).

Compared to the PRC algorithm, the ISPF algorithm only calculates the changed leaf nodes when the route changes PRC algorithm to recalculate routes

When the first and second class LSAs on the network change, OSPF uses the ISPF algorithm to recalculate the routes The

OSPF router uses the FULL SPF algorithm to calculate all nodes in the network when initially calculating routes

57. Which of the following DNS resource records are legitimate?

FQDN

PTR

58. The address resolution feature for NDP in the following description is incorrect?

When sending a neighbor request packet, the source address―is set as the link-local address

of the local interface Two types of ICMPv6 messages,

are used in the address resolution process, neighbor request and neighbor advertisement Address resolution implements the ability to resolve from IPv6 addresses to link-layer addresses

When sending a neighbor request packet, the destination address must be the multicast address of the neighbor's requested node

59. Regarding the Stub region and the Totally Stub region of the OSPF protocol, the following statement is correct (multiple choice)

After modifying the original Stub area to a Totally Stub area, the number of LSAs in the LSDB of each router in the region will definitely be reduced

ASBR cannot be present in either the Stub zone or the Totally Stub zone

When you modify the original Stub area to a Totally Stub region, the number of LSAs propagating within the region will definitely decrease

If there are two ABR in the Totally Stub zone, each ABR sends an LS ID of 0000 to the router in the zone LSA

60. LDP and IGP linkage refers to the release of IGP and TD routes to ensure that LDP and IGP linkage complete network efficiency, so that KGP and LDP maintains a consistent path, minimizing traffic loss, thereby improving the reliability of the entire network.

True

False

Page 7 of 19

61. How do IGMPv2 routers maintain cinderband group membership? Multi-select

The router queries a specific group

The router maintains a timeout timer for each group membership, refreshes the timer if the receiver host is received, and deletes the group membership if the timer times out

The router periodically sends a Query message, and after the receiver host receives the Query message, it reports a Report message

As soon as the leave message is received, the router immediately deletes the group membership

62. Huawei's two switch SWA, SWB is connected together through 7 Ethernets, and static route aggregation is configured, and the corresponding ports on the switch SWA are E1/0/1, E1/02, E1/0/3, E1/0/4, E1/ 0/5, E1/0/6, E1/0/7, configured sequentially as if switch SWA, SWB Each aggregation group supports only 6 ports.

With the same configuration across ports, the Ethemet 1/0/7 port is the aggregate group Unselected port

With the same configuration of each port, the Ethemet 1/0/6 port is the aggregate group Unselected port

With the same configuration of each port, SWA randomly selects one of the 7 ports as the aggregate group Unselected port

With the same configuration of each port, the Ethemet1/0/1 port is the aggregation group Unselected port

63. Regarding the difference between NSR and NSF, the correct one is?

The NSR must rely on a neighbor router to complete

Both NSR and NSF require a neighbor router to complete

NSF must rely on neighbor routers to complete

NSF does not require a neighbor router to complete

64. : :1/128 is the IPV6 loopback address

TRUE

False

65. Router R1 runs the OSPF protocol, use the "display ip routing-table" command to view the routing table of the router R1, the following about the OSPF in the routing table Is the information described correctly?

In the routing table, route table entries identified by the "OSPF" identifier can only be learned through LSAs of Type 3

In the routing table, the routing table entries identified by the "OSPF" identifier can only pass Class 1 LSA

In the routing table, the routing table entries identified by the "OSPF" identifier can be learned through the 1/2/3/5 LSA

In the routing table, the routing table entry identified with the "O_ASE" identifier can only be learned by routing introduction

66. When running OSPFv3 on a Huawei router, the OSPFv3 process automatically selects an interface address as the process router id

True

False

67. The following statement about IPSec VPN is correct?qo

Two routers establish an IPSec VPN in brutal mode, so that the two devices can interact with a minimum of 4 messages to establish a tunnel.

Brutal mode can support NAT traversal, while main mode does not support NAT traversal.

The two routers can establish OSPF neighbor relations and exchange intranet routes through the IPSec VPN tunnel

The two routers establish IPSecVPN in main mode, and from the 5th packet (included), the payload's data will be encrypted.

68. When DLDP detects the presence of a one-way link in the fiber, the default actions of Huawei equipment include: the DLDP state machine migrates to the Disable state, outputs Trap information, and automatically sets the interface to a blocked state.

True

False

69. IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)

This is a specific address that is used for resolution in ARPv6 The MAC address.

The Solicited-Node address on the router interface is automatically generated and can have multiple.

If the Solicited-Node address is not configured, the router automatically generates one on each interface.

IPv6 introduced the Solicited-Node address to support IPv6 multicast.

70. There are many ways to establish a cluster on a box switch, what methods does Huawei frame switch support to establish a cluster?

Set up via a cluster card on the motherboard

Establish

through the cluster daughter card on the interface board. Establish

through the service interface on the interface board Established by switching the cluster card on the network board

Page 8 of 19

71. The following description of the attributes of BGP is correct? (Single choice questions).

The AS deficit of the adjacent AS is ranked at the far right of the list of AS_Path in the BGP route entry.

When the

BGP Speaker publishes a route learned from an EBGP peer to an IBGP peer, it does not change the next hop attribute of that routing information.

Local_Pref is valid only between EBGP peers and is not advertised to third-party A

A route can have only one community attribute value.

72. Between two directly attached devices that have established an IBGP neighbor, execute the shutdown command to close the interface of one of the devices. The BGP connection is not immediately disconnected.

TRUE

FALSE

73. The following statement about static VXLAN tunnel configuration is correct?

A BD needs to create an NVE country, and when there are multiple BDs, multiple NVE interfaces must be created

An NVE interface can be associated with multiple VNls, so you can create only one NVE interface when there are multiple BDs

For a VXLAN tunnel, you need to create a corresponding NVE interface, in which you explicitly specify the source IP address and the destination IP address, so there are multiple VXLAN tunnels on the VTEP that must be vE interfaces The destination address of the VXLAN tunnel is specified in the

NVE interface, and multiple VXLAN tunnels can create only one NVE interface

74.

When sending a packet with a destination address of 4444, it is sent without labeling.

When the router receives a packet with the label 1024, it replaces the label with 1027 and sends it.

When a packet with a destination address of 2222 is sent, it is sent without labeling.

When sending a packet with a destination address of 3333, label 1026 and send it.

75. In the description of the MAC address spoofing attack, the error is? Radio

Mac address spoofing attacks cause the switch to learn the wrong mapping of Mac addresses to IP addresses

A MAC address spoofing attack causes the data that the switch is sending to the correct destination to be sent to the attacker

MAC address spoofing attacks primarily exploit the switch Mac address learning mechanism

An attacker can perform a MAC address spoofing attack by sending a forged source Mac address data frame to the switch

76. Because BGP is an EGP routing protocol, BGP routing policies can only be deployed between EBGP neighbors, and routing policies between IBGP neighbors are not valid.

TRUE

FALSE

77. Among the routing policy tools commonly used by BGP, which ones can be used to filter routes?

filter-policy

Route-policy

lp extecommunity-filter

Traffic-policy

78. The correct description of the scene shown in the following figure is:

LSDB

R1, which exists in both Level-1 and Leve-2, can ping the interface address of R2 loopback0

R there is a route to R2 loopback0 10022/32

No neighbor relationship can be established between R1 and R2

79. The following message about the Register in PIM-SM describes the correct? (Multiple choice questions).

The Register message enables the RP to learn the multicast source information

The Register message is sent by the receiver router

The Register message is sent by the source DR

80. The following statement about the Security Alliance SA in IPSec is wrong with?

SA is uniquely identified by a triple that includes the Security Parameter Inder, Security Parameter Inder), the source IP address, and the Security Protocol Number (ASESP) used

Use the display ipsec command to view information such as the encryption method used with another IPSEC peer, the traffic of interest, and so on.

IPSec only supports encrypting data using the pair encryption algorithm.

IpSec peers must be at a two-way SA to establish an IPSec VPN connection to close

Page 9 of 19

81. The basic header length of an IPv6 message is a fixed value.

TRUE

FALSE

82. As shown in the following figure, a part of the LSDB LSDB of a router LSDB is shown in the first one in the following figure. A new LSP has been received, the second one in the figure below, and the following statement is incorrect (single choice).

this router will put the newly received LSP into the LSDB

In the case of a broadcast network, DIS will include summary information for this LSP in the next CSNP message.

This router ignores LSPs received from neighbors

If it is a point-to-point network, the router will send PSNP

83. OSPF fast convergence is an extended feature to improve the convergence speed of routing, in which PRC works by speeding up routing computation by performing path calculations only on the affected nodes when the network topology changes.

TRUE

FALSE

84. The following message about OSPFV3 is correct?

The Option field of the Hello and DD packets extends to 24-bit

LSR packets containing the full LSA header information for requesting an update to the LSA

The LSACK message contains LSA header information to confirm receipt of the LSU message

The Hello message must contain the interface ID of the sending interface

85. As shown in the figure, three switches S1, SW, and SN3, where SWI is the root bridge, and link congestion occurs between SI and SW2, SWD cannot receive the configuration BPDU sent by the root bridge, which spanning tree protection mechanism does the administrator need to configure to prevent the problem caused by link congestion? (Single choice questions).

root protection

PreventS TC-BPDU attacks

BPDU Protection

Loop Protection

86. The HTTP protocol is based on TCP, so http Flood attacks can be defended against HTTP Flood attacks using the TCP Flood attack prevention method.

True

False

87. Firewall security policies have the condition for traffic matching to be? (Multi-select)

apply

Source item security zone

Source item IP address

Message length

88. The most effective way to view device warnings through the CLI is?

Display alarm

Display current-configuration

Display interface brief

Display clock

89. Although the STP protocol can solve the loop problem, it affects the quality of user communication due to the slow convergence of the network topology. RSTP has made many improvements to STP, which of the following is not an improvement of RSTP to STP?

In addition to the 3 port states, RSTP vice adds 2 new port roles

Non-root switches running RSTP send configuration BPDUs at intervals specified by Hello Timer, a behavior that is entirely autonomous for each device

RSTP port state specification is divided according to whether the port forwards user traffic and learns the MAC address, reducing the original 5 port states to 3

If a port does not receive a configuration BPDU sent by the upstream device for 4 consecutive Hello Time, the device considers the negotiation with this neighbor to fail

90. The following statement about OSPF route filtering is incorrect. (Single choice questions).

In the NSSA area, filtering for external route ingestion and advertisement can be configured on ASBR or ABR

Filtering for the three types of LSAs needs to be configured on the ABR across OSPF regions

Interface-based filtering of LSAs allows all LSAs in the inbound and outbound directions except grace LSAs

Based on the link state database, when calculating routes, the fiter-policy import command is used, which only affects the route addition in the route table, and has no effect on the OSPF link state database

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91. You need to configure smart policy routing on the router to specify that specific traffic is forwarded through an interface. When policy-based routing is applied, what are the two most typical types of information that can be used to forward traffic along a particular path?

The TTL and source IP address of the packet

Source A address and the Layer 2 source address

Source IP address and specific protocol (such as FTP, HTTP, etc.)

Service type header and message length

92. Which of the following sequences can be matched by the regular expression [^100|200]$?

300200 100

200 100 300

100 200 300

100,300,200

93. If there is a switch running RSTP, which interface on that switch sends the BPDU with the Proposal logo??

The specified port

in the forwarding state. The specified port in a non-forwarding state

Alternate port

The root port in the Blocking state

94. In the topology shown in the figure. Running the OSPFv3 protocol over the entire network does not produce what type of LSA on R1 without external route introduction?

Intra-Area-Prefix-LSA

Inter-Area-RouterLSA

Link-LSA

Inter-Area-Prefix-LSA

95. CORRECT TEXT

The switch role in the stacking system does not include?

A From the switch

B. Candidate Switch

C. Standby Switch

D. Primary Switch

96. Is the following description of the BSR/RP mechanism correct?

PIM-SM domain can have more than one C-BSR, but only one BSR can be elected by the C-BSR that receives the C-RP Packets are collected C-one RP information

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain by flooding Bootstrap packets

A C-BSR can also collect C-RP information by receiving C-RP packets

97. BGP authentication can prevent illegal routers from establishing neighbors with BGP routers, BGP authentication can be divided into MD5 authentication and Keychain authentication, please ask which BGP messages will be carried below BGPKeychain authentication information? (Multiple select).

Update

Notification

Keeplive

Open

98. A router Router LSA is shown in the figure below, and the following statement is incorrect?

This router is a DR

This router has established an adjacency relationship

This router supports external route ingestion

The Router ID of this router is 100121

99. Router RL and Router R2 run BGP both routers are in the AS65234 The router R2 route is present in the BGP routing table of router RI, but not in the P of router R1 road

With BGP, both routers are in the AS65234 Route cry PD is done by the right big worker

By the table, so what causes the problem to occur? A, synchronization is turned off

The

BGP neighbor relationship is Down

Router R1 does not enable BGPMulti-hop D Routing is not optimal

100. LDP messages are exchanged between LDLRs running the LDP protocol, and LDP messages can be divided into four types according to function, which of the following is not an LDP message type?

Advertisement message

Discover message

Conversation message

Label Exchange Information

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101. What are the following techniques for improving MPLS BGP VPN reliability? (Multiple choice question)

dual home networking is configured at the access layer

VPN FRR

VPN GR Private IP routing between

PE-CE FRR

102. Cross-device link aggregation realizes the back-to-back transmission of data traffic and the mutual spare of the heap member switches, but due to the limited bandwidth of the heap cable between the heap devices, the forwarding efficiency can be improved in the following ways?

Enable traffic to be forwarded locally first

Connect the stacking device via a stacking card

Configure the stacking system MAC address switching

Enables the stacking multi-master check function

103. BGP EVPN does MAC address advertisement, ARP message advertisement, and IRB route advertisement for which BGP EVPN route is advertised?

Type3

Type2

Type4

Type1

104. There is an existing router interface serial 0 in OSPF area 1, well will interface Serial 0 is set to silent interface. So what is the impact of this setting?

OSPF establishes usable adjacencies through this junction

OSPF does not join the routes learned from the connector to the local routing table

OSPF does not establish any adjacency relationships through the junction

OSPF receives a route update answer from the neighbor.

105. Four routers running IS-4S and an adjacency relationship has been established, the area

number and the level of the router are noted in the figure, and the R4 reaches 10022/32 on the RI device Cost for how much?

106. In the following topology diagram, R1 can access the Internet through R2 and R3, R1 and R2, R1 and R1 An EGP connection is established between R3, and R2R3 belongs to the same AS, each via BGP Publishing a default route that requires R1 to visit lnternet's traffic preference R2, can the following practices be achieved?

R1 specifies that the peer R3 sets the MED property to 150 in the import direction

R2 specifies that the peer R1 sets the local priority to 150 in the export direction

R2 specifies that the peer R1 sets the MED property to 150 in the export direction

R1 specifies that the peer R2 beats the local priority in the import direction to 150

107. Regarding MP-BGP, the following description is wrong?

A. Radio

A. MP-BGP needs to assign a private label to the VPNv4 route

B. PE and CE are routed through BGP interaction, you need to create a BGP process on ce for each VPN instance

C. The message type and VPNv4 routing publishing policy for MP-BGP are the same as for BGP-4

D. MP-BGP advertises VPNv4 through two attributes, MP_REACH_NLRI and MP_UNREACH_NLRI Route

108. In route-policy, what are the BGP attributes that can be used for the apply clause?

AS-Path

MED

Local-Preference

Day

109. A company network runs the OSPF protocol, a project in order to understand the OSPF mechanism in the network to perform packet transfer operations, the following description of ospf messages is correct?

The interface sends a Hello packet immediately after joining the OSPF region

LS update packet is sent only when the adjacency relationship is established

When an LsUpdate packet is received, the router must send an LsAck acknowledgment

LS update packet synchronizes the link state database by sending detailed LSA information 2

110. ISlS protocol In broadcast networks and P2P networks, when the router receives LSP, it needs to use PSNP to confirm and ensure the synchronization of LSDB

True

False

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111. The correct statement about the difference between OSPFv2 and OSPFv3 is? Multi-select

BOTH OSPFv2 and OSPFv3 support interface authentication. And OSPFv3 authentication is still based on the fields in the ospf message header

OSPFv3 is similar to OSPFv2 in that it uses a multicast address as the OSPF message destination address

The same type of message exists in OSPFv2, OSPFv3: Hello, DD, LSR, LSU, LSAack, Their message format is the same

OSPFv2 has the protocol number 89 in the IPv4 packet header, OSPFv 3 The next number in the IPv6 message header is 89

112. In a network in MPLSVPN, different CE devices can exchange routing information with the same PE device using different routing protocols, and different CE devices can exchange routing information with the same PE The routing protocols used between devices are independent of each other

True

False

113. The following description of VLANs in Ethernet is correct?

VLANs do not support bulk creation on devices

The range of VLANs is 0 to 4096

The default reserved VLANs for Huawei devices are 4000~4010

VLANs can be extended through QinQ technology.

114. The topology diagram and configuration are as follows, and now we hope that there is no buttoned route entry of 10033/32 in the Rl route table

Configure route summarization on R3 to summarize the routes to 10000/16

Configure route rollup on R2 to summarize the route as 10000/16

Configure filter-pollcy on top of R1 with 10033/32 via ACL

Also applied in the Import direction

Configure flter-policy on the above, match 10033/32 through ACL, and apply the answer in the expo direction

115. The switch SWA and SWB are connected together by 2 Ethernet links, where the switch SWA has the following interface configuration:

Without changing the current configuration, GigabitEthernet1/0/1 and GigabitEthernet1/0/2 can join the same aggregation group

Because of the different VLANs allowed, GigabitEthernet1/0/1 and GigabitEthernet1/0/2 cannot join the same aggregation group

After link clustering is configured on both SWA and SWB, if MSTP is enabled on the switches SWA and SWB Both GigabitEthernetl1/0/1 and GigabitEthernetl/O/2 are the forwarding status of MSTP

Only if the configuration of GigabitEthernet 1/0/2 is changed to match GigabitEthernet 1/0/1 can the two join the same aggregation group

116. Compared to IPV4 multicast, which of the following descriptions is the characteristic of IP6 multicast?

IPv6 multicast does not contain MSDP and dense mode

The first 8bit IPV6 multicast address is always FF(11111111).

IPv6 multicast clients use IGMPv3 to join multicast groups

IPv6 multicast load sharing extends the multicast routing rules and is completely independent of RPF check

117. OSPFV is the GP running on the P4 network) OSPF3 is the KGP running on the IP6 network. OsPFV works the same basic way as OSPF2, such as elections for DR and BDR. As shown in the figure, an engineer uses three routers for IP6 service testing, and he wants to interconnect the IPv6 network by running OSPFv3.

Which of the following statements is correct regarding the election of the network DR?

After the network converges, R1 is DR

After the network converges, the engineer modifies the priority of R1 to 100, the priority of R2 to 10, and R3 to the default value. When the network converges again, Rl is DR and R2 is BDR

After the network converges, the broadcast link adds a device, R4, with a priority of 150 When the network converges again, R4 is DR

After the network converges, R1 is powered off and restarted, and when the network converges again, R3 is DR

118. The following description of BGP ring protection is correct

The BGP router does not announce any updates from the EBGP peer to other EBGP peers

BGP routers that are not RR do not announce any updates from the IBGP peer to other IBGP peers

Any routing information from the IBGP peer is advertised to the other IBGP peers

through the AS-path attribute, discard any update information received from the EBGP peer that contains its own AS number in the AS-path attribute

119. ICMPv6 has two types: Error Messages and Information Messages.

TRUE

FALSE

120. The correct description about the prefix list is:

The prefix list is used to filter P prefixes and can match both prefix numbers and prefix lengths

The prefix list is used to filter IP prefixes, and cannot match both the prefix number and the prefix length

The prefix list cannot be used for packet filtering

The prefix list can be used to filter packets

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121. BGP EVPN advertises external routes, which of the following routes?

Type1

Type2

Type3

Type4

Type5

122. In the following topology diagram,

R1 can be established between R2 and R3 fetches the Internet, RI and R2, R1 and R3 EGP connections, R2, R3 belong to the same AS The default routes are issued through BGP separately, requiring R2 to be preferred for traffic accessed by RI to the Internet, and the following practices can be achieved

R1 specifies that peer R3 sets the MED property to 150 in the import direction

R2 specifies that peer R1 is in export The direction setting local priority is 150

R2 specifies peer R1 in the export direction setting MED property to 150

R1 specifies the peer R2 sets the local priority in the import direction to 150

123. In an MPLSVPN network, when a packet enters the Internet and is forwarded, it is encapsulated with two layers of MPLS tags, and the processing of the packet in the following options is described correctly?

The penultimate hop device receives packets with an outer label of 3

The Egress PE appliance receives an UNlabeled IP packet

The Egress PE device correctly sends packets to the appropriate VPN

based on the inner tag The packet pops up the outer label on the penultimate hop device and forwards it to the Egress PE device

124. Without dividing the zone, is the following description of the link state routing protocol correct?

Each router establishes a topology for the entire floodplain

Each router learns route entries directly from the route update and adds them to the routing table

Routers in the flood domain may receive the same link state information repeatedly

Routers throughout the flood domain have the same database of wrong-state states

The router will send all the mis-routing status information from one neighbor to all other neighbors to ensure the synchronization of the database

125. By default, routers running IS-IS in broadcast networks have a period of seconds for DIS to send CSNP packets?

126. After you divide an interface of the firewall into the Untrust security domain, the interface belongs to the Untrust zone and no longer belongs to the Local zone.

TRUE

FALSE

127. What is the following correct for the process of registering the source-side DR with RP in PIM-SM?

Encapsulated in the registered message is multicast service data

RP sends a registration stop message as soon as it receives the registration message.

Registered messages are used to build the RPT tree between source DR and RP

Registered packets are multicast packets.

128. For the description of firewall security zones, the following statement is correct?

The same interface of a firewall can belong to different security zones

Different security zones of the firewall, the priority can be the same

The built-in security zone of the Firewall can be deleted

Different interfaces of the firewall can belong to the same security zone

129. Regarding the certification of the ISIS protocol, there is a correct statement

Connection authentication can realize the authentication of the hello messages of Leve-1 and Leve-2

After configuring the connection authentication, the IIH issued by the router must carry the authentication TLV

After configuring zone authentication, the router issues an IIH, SNP, LSP―strap-to-tape authentication TLV

The two routers are configured for area authentication and interface authentication, and the passwords are the same, so the two can establish an isocopied relationship

130. MPLS is called multiprotocol label switching, and with respect to label descriptions in MPLS, the correct one is? (Multiple select).

The MPLS system has a variety of label publishing protocols, such as LDP is a label publishing protocol

The label is carried by the head of the MPLS message and has a global significance, that is, the label value of all routers cannot repeat

A tag is a fixed-length, locally only meaningful identifier that uniquely identifies the FEC to which a group belongs

MPLS supports single-layer tags as well as multi-tier tags

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131. Which SNMP message type sent to NMS reports events that are reliable? (Single choice questions).

Inform

Get

Response

Trap

Get Bulk

132. The router port to which the policy is applied has been idle for about 10 seconds, and there is a huge burst of c1 type coming in an instant, so how many bytes will the packets that are colored green?

256K bytes

48128 bytes

32K bytes

80128 bytes

133. As shown in the figure, R1, R2, and R3 run OSPP at the same time and declare their respective ring ports, as described below is the error.

R2, you can use the filter po y export command to filter R3's loopback route

R2 you can make Ëfilter in Area 0 The import command to filter the loopback route for R3 on

RI can make Ëfilter-policy import filter the loopback route for R3

RI, you can use the Make Ëfilter export command in Area 1 to filter loopback routes for R3

134. The rules for RR to publish routes break the rules for horizontal segmentation of IBGP, so it is possible to cause loops within the AS .

What routing attributes does RR use to prevent loops?

Nexthop

Originator ID

AS-PATH

Cluster List

135. As shown in the figure, SWA, SWB, SWC all run RSTP, GED/O/2 on SWB Ports and GEO/0/1 ports on SWC have a port role of? Radio

Alternative port, Backup port

Backup port, root port

Root port, Designated port

Backup port, Alternative port

136. The following description of Link ID, Data, Type, and Metirc in Router-LSA is correct :(Multiple select).

Metric describes the overhead of this connection

The Link ID represents the local identity of this connection, and the different connection types The Link ID represents different meanings

Data is used to describe additional information for this connection, and different connection types describe different information

Type indicates the type of connection

137. The following description of the attributes of BGP is correct? Radio

The AS number of the adjacent AS, ranked to the far right of the list of AS_Path in the BGP route entry.

When a BGP Speaker publishes a route learned from an EBCP peer to an IBGP peer, it does not change the next hop attribute of that routing information.

Local_Pref is valid only between EBGP peers and is not advertised to third-party AS

A route can have only one community attribute value.

138. The following description of BGP load sharing is wrong with? (Multiple choice question)

The AS_Path properties of the equivalent routes that form load sharing must be different.

The destination CIDR blocks are the same, and load sharing can be formed between BGP routes with different sources.

If BGP load sharing is implemented, the local device needs to configure the peer next-hop-local command to change the next hop address to its own address when issuing a route to an IBGP peer group .

IBGP routes and EBGP routes that reach the same destination in the public network can form a load sharing

139. The main routing policy tools that BGP can use are Filter-policy and Route-policy, where Fate-policy can only filter routes and Route-policy can only modify routes

TRUE

FALSE

140. As shown in the figure, the use of redundant links between the branch and the headquarters to establish IPsecVPN, while turning on URLPF on the Router_B for traffic from branch l, which of the following options is correct?

When using IPsec active-standby link redundant backups to enable the URPF function under the physical interface, it is recommended to use URPF loose mode.

When using IPsec multilink redundant backup, the URPF function can be used under the physical interface, and URPF strict mode can be used

When using IPsec multilink redundant backups, urPF can be enabled under the tunnel interface, and URPF strict mode can be used

When using lPsec active-standby link redundancy backup, the URPF function is enabled under the physical interface, and URPF strict mode can be used.

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141. In order to study the working mechanism of the OSPFv3 protocol, a project to build a network topology is as follows, the configuration of R1 and R2 is as follows, please ask the LSA switched between R1 and R2 What are the types?

network-LSA

Router-LSA

Link-LSA

Inter-area-prefix-LSA

142. When deploying the ISIS protocol in an IPv6 environment, the following statement is correct (single choice).

By default, the DIS priority for broadcast network interfaces at Level-1 and Level-2 is 1

In broadcast networks, IPv4 and The DIS priority for IPv6 can be set separately

In the same broadcast network. If each router supports both IPv4 and IPv6 The DIS for IPv4 and IPv6 must be the same device

IS-IS is configured under the finger port is ISIS silent, this interface will not send ISIS packets, but will receive ISIS packets

143. The following description of the GVRP interface registration mode in Huawei switches is correct?

When fixed registration mode is selected, the interface cannot propagate dynamic VLANs

When the normal registration mode is selected, allow the interface to dynamically register and unregister the VLA

Logout here includes deleting dynamically learned VLANs and VLANs created natively by the administrator

When the interface layer two operating mode must be hybird

GVRP when the register mode with forbidden is selected, there are four types of interface registration mode

144. RD is used to distinguish the same IP address in different VPNs, how many bits does RD contain? (Single choice)

128

145. What are some of the following misrepresentations about URPF, IPSG, and DAI technologies? (Multiple choice questions).

DAI does not support manual configuration of binding tables.

IPSG checks the source IP address and source MAC address of the IP packet, and DAI only checks the correspondence between the IP and the MA

URPF can be used to protect against DDoS spoofed source attacks.

IPSG technology checks IP packets for source IP spoofing attack prevention, while DAI checks ARP packets to filter attack sources.

146. If you run PIM-SM in a multicast network, you need to build a multicast forwarding tree between the multicast source and the receiver to enable the receiver to receive the multicast effect, so what are the following options for the correct tree sketch for the build?

What is built between the multicast source and the RP is the SPT tree

RP and the receiver is built between the RPT tree

Built between the RPT tree

RP and the swap is the SPT tree

147. In an MPLS BGPVPN environment, if tags are distributed only through BGP and LDP, the MPLS tags of the message can be up to two layers of tags

True

False

148. As shown in the following figure, R1 and R2 establish a neighbor relationship with LeveL2, and the key configuration is as follows, so is the following route entry for R2 correct?

0::/64 The router will appear in the IP routing table

2022::/64 Routers appear in the IP routing table

2019::/64 Routers appear in the IP routing table

2021::/64 Routers appear in the IP routing table

149. The Serial Number field of LS is used to detect expired and duplicate LSAs. The field is a 32bt signed integer, so the small serial number is Ox8000000

True

False

150. What kind of scenario can use AS-path-filter? (Multiple select).

A Filters routes received from BGP neighbors based on the AS PATH attribute carried by the route, such as the command peer

x.x.x as path-filter import

The apply clause in Route policy

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peer x.x.x.x as path-filter export

The if-match clause in Route-policy

Page 16 of 19

151. Regarding the domain-authentication-mode md5 hello command in the ISIS process, the correct explanation is?

ISIS authentication cannot be applied in IPv6 environments.

This command is mainly used to make is the ISIS Hello message carry authentication information during the transmission process.

All router domain authentication methods of the same routing domain are MD5, the password is hello, and lS-IS SNP and LSP will spread normally.

outing domain authentication is primarily used to allow level-1 and Level-2 SNP and LSP messages to carry authentication information during delivery.

152. As shown in the figure, all routers run OSPF, which is correct in the following statement:

Both R2 and Zone 0 generate Router LSA

R2 generates Router LSA only in Zone 0

R2 forwards the R1-generated Router LSA to R3

R2 Forwards the R3-generated Router LSA to R1

153. As shown in the figure,

RI, R2 establishes an EBGP neighbor and turns on the BFD detection function, the following statement is correct

Detection time for BFD packets for AR2 800ms

R1 Detection time for BFD packets for 1280ms

R1 Detection time for BFD packets The detection time for BFD packets for 660ms

R2 is 600ms

154. Which of the following attacks are DoS (Denial of servioe) attacks? (Multiple choice question)

Single packet attack

Source P address spoofing attack

Man-in-the-middle attack

Flood Attack

155. SNMPv3 defines which security features

Privacy

Authentication

Domain checking

Accounting

156. Which of the following statement about isis protocol route aggregation is correct?

Route aggregation can be configured and takes effect on all types of routers

Route aggregation can only take effect if configured on Leve-1 port routers

Route aggregation can only be configured on Leve-2 routers to take effect

Route aggregation can only be configured on Leve-1-2 routers to take effect with

157. The following description of the process of sending and receiving data frames in switch interface Access mode is correct? (Single choice questions).

In Access mode, labeled data frames are discarded directly when they are received.

Access mode strips off the VLAN tag of the dataton when sending.

Access mode receives only unlabeled data frames.

When a data frame enters the switch interface, the switch learns the destination MAC address in the data frame.

158. The following description of the characteristics of cross-domain VN-Optionc is correct?

A maximum of two layers of tags need to be used in the message forwarding process.

VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.

VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN route.

Cross-domain VN-Optionc, which is not suitable for use when spanning multiple A

159. ipv6 link-local addresses can be generated through stateless autoconfiguration

TRUE

FALSE

160. Regarding the MPLS basic forwarding process, the following description is incorrect? Radio

By default, the PHP-enabled Erass node assigns a label value of 3 to the inverted second-hop node.

When an IP message enters the MPLS domain, the MPLS boundary device inserts a new label between the layer 2 header and the IP header.

When the P message enters the MPLS domain, check whether the Tunel lD value corresponding to the destination IP address is Ox0O If the Tunel IlD value is Ox0 Then enter the MPLS forwarding process.

The transport node device replaces the existing top-of-stack label (outermost label) with the label assigned by the next hop device.

Page 17 of 19

161. Mainstream Layer 2 tunneling technologies include VXLAN TRILL, NVGB and MPLS.

FALSE

TRUE

162. Router HW1 and Router HW2 connect Network A and Network B, respectively. As shown in the figure below, if you want to set up an IPsec VPN between router HWI and router HW. (single selection).

rule permit ip source 1921681.10 destination 1921681.20

rule permit ip source 101.1.0000255 destination 1921681.20

rule permit ip source 101.1.0000255 destination 101.20000255

rule permit ip source 1921681.10 destination 101. 20000255

rule permit ip source 101.20 000255 destination 101.1.0000255

163. Huawei's SDN controller using VXLAN technology is fixed?

Agile Controller-Campus

Agile Controller-WAN

Agile Controller-DCN

164. The following statement about EVPN Type5 routing is wrong? (Single choice questions).

Type5 routes carry Layer 3 VN

Type5 routing carries both Layer 2 VWI and Layer 3 VNI

The IP Prefix field can carry both host and network segment addresses.

Type5 is an IP prefix route.

165. The correct description of the extended features of ISIS is?

When the amount of information in the Link State Protocol data packet PDU to be released by ISIS is too large, the ISIS router will generate multiple LSP shards to carry more ISIS information.

ISIS can choose whether to authenticate incoming SNP and LSP packets

If there are other vendors' devices on the network and do not support the LSP sharding function, the sharding expansion mode must be configured as Model-1, otherwise the message will not be recognized by other vendors' devices.

After you enable the LSP shard extension feature of your router, you can use it without restarting the ISIS process.

166. In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as?

RD can be used to control the publication of VPN routing information

On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device

RD is encapsulated in the Update message as an extended community attribute of BGP during delivery

After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network

167. What improvements have been made to the IGMPv2 protocol compared to IGMPv1? (Multiple Choice)

Added maximum response time field

Added high group messages

Added specific group query message

Added a specific source group query packet

168. RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are?

Multicast network statically configures RP, while RTA router does not statically configure RP

The RP elected by RTA is not an RTB

RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source

The multicast network dynamically elects the RP instead RTA failed RPF check for BSR

169. Regarding Route Policy, is the following description correct?

Advanced ACLs can be applied in route-policy to filter routes

The table entries pernit::0 Less an equal 128 indicate that all IPV6 routes are allowed through

If more than one node is defined in Route one policy, there should be at least one node in each node that matches permit

Route one policy filters only the default route

170. In an Hw IP multicast network―which of the following multicast features are associated with (*, G) table entries? (Multiple select)

Dense mode

Source tree

Sparse mode

PIM bidirectional

Share the tree

Dense Tree

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171. During the LDPsession setup process, the active party first sends the Illitalization information to negotiate the parameters, and if the passive party does not accept the negotiation parameters, which of the following messages will be sent? <(Single select).)

Hello Message

Error Notification Message

Keepalive Message

Initialization Message

172. The duplicate address detection feature for NDP in the following description is incorrect?

IPv6 unicast address is called a tentative address after it is assigned to an interface and before it is detected by duplicate addresses

Duplicate address detection is implemented via RS and RA messages

IPv6 duplicate address detection technology is similar to free ARP in IPv4

The interface needs to perform duplicate address detection before enabling any of the unicast IPv6 addresses

173. If all the public IP addresses are used by a company's intranet users to access the Internet using NAT's No-pat method, what will happen to subsequent intranet users who access the Internet?

automatically switch NAT to PAT after the Internet

Subsequent intranet users will not be able to access the Internet

Synchronize messages to other NAT conversion devices for NAT conversion

Squeeze out the previous user and force NAT conversion to go online

174. In order to reduce the number of OSPF routes in some unscheduled areas, the OSPF protocol has developed special area functions, and the following characteristic description of ospf special areas is correct? (Single choice questions).

ASBR-Sunmary-LSA is allowed to be published to NSSA regions

AS-External-LSA is allowed to be published to Stub regions

Any OSPF zone can be configured as a special zone

Special area routers cannot establish OSPF neighbor relationships with regular area routers

175. Which of the following options is correct?

Unicast and broadcasting cannot effectively achieve data transmission between one source and multiple destinations on P2MP, but multicast technology can

Multicast technology is able to reduce redundant traffic, so network bandwidth can be saved

Multicast technology is used for "-to-many" applications

Since multicast is based on TCP to establish a connection, multicast technology can ensure the reliable transmission of data

176. Which of the following parameters should be modified to re-establish the is-IS neighbor relationship?

Modify the Cost value of the IS-IS interface

Modify the send interval for the IlH of the IS-IS interface

Modify the Level of the IS-IS interface

Modify the IP address of the IS-IS interface

177. If there are multiple recipients in a multicast group, the administrator enables the IGMP-Snooping function on the switch connecting the recipient, and when the receiver receives the universal group query packet of the queryer from the switch, how should multiple recipients respond?

The first recipient whose response time time expires sends the Report message, the other receivers do not.

All recipients will respond to Report messages only if ICMPV2 is running.

All recipients will respond to the Report message only if IGMPvl is running.

All recipients will respond to the Report message

178. A workstation is connected to an Ethernet switch in the work through a super-class 5 wire, the workstation can access the entire network (that is, full connection) through the switch, but the access rate is much lower than expected, when viewing the switch interface statistics, you can detect that there are many ultra-small frames, with software to read the statistics of the workstation network card, found that there are Many FCS and frame alignment errors, what causes the machine to cause these errors?

The rate mismatch between the workstation and the switch

Interface mismatched to an 8021Qtrunk interface

The line between the workstation and the switch has been completely damaged

The operating mode between the workstation and the switch does not match

The network interface card on the workstation is damaged

179. The following description of the PPPoE data frame is correct? (Multiple choice questions).

Once a PPPoE session is established, all Ethernet packets are unicast

The Ethernet_Type domain is fixed to Ox8863

When PPPoE passes session data, Code must be set to Ox0

The Session_ID of the PPP session is not allowed to change and must be the specified in the Discovery phase

180. Regarding the OSPFv3 protocol, what is the error described below?

Under the sukugan of a shared router, each OSPFv3 process runs independently

Multiple instances can be run in the same OSPFv3 under the same interface

Can support running multiple instances on a single link

OSPFv3 message header will contain instance IDFu Duan flogging

Page 19 of 19

181. The following is the correct description of the aggregation of BGP? (Single Choice Questions).

After you configure aggregate ipv4-address mask, only aggregate routes are published, not detail routes.

For IPv6 routing, BGP supports manual coalescing and automatic aggregation

By default, BGP enables automatic aggregation

You can manually aggregate the routes in the BGP local routing table with a profile

182. s the following description of THE MUX VLA N in huawei switches correct?

MUX VLAN??Principal VI-AN?Subordinate VI-AN???Separate VLAN? Isolate VLAN

Each Separate VLAN can bind multiple Principal VLANs

Under the same VLAN, muX VLANs can be mixed with SuperVLANs

The Principal port can pass the answer to all ends within the MUX VLAN

183. Regarding route Policy, the following description is correct as? (Multiple selection) Multiple selection

Advanced ACLs can be applied in route-policy to filter routes

The table entry exceed::0 less-equal 128 indicates that all IPv6 routes are allowed through

If more than one node is defined in Route-policy, at least one node in each node should have a matching pattern of permit

Route-Policy can filter only the default route

Huawei HCIE-Datacom H12-891_V1.0 Exam Dumps

Huawei HCIE-Datacom H12-891_V1.0 Exam Dumps

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