HCIE-Data Center Network H12-921_V1.0 Written Exam Dumps

dumps2024-02-20T11:59:41+08:00

HCIE-Data Center Network certification indicates that you have a solid theoretical knowledge of data center network scenarios, and so on. There are 60 questions in the real Huawei Certification H12-921_V1.0 exam, and you have 90 minutes to answer all the questions. The required passing score for the HCIE-Data Center Network H12-921_V1.0 exam is 600 (the total score is 1000). The exam cost is $300. The available languages are Chinese and English. Free HCIE-Data Center Network H12-921_V1.0 written exam dumps are below.

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1. Which of the following devices can be used as service nodes in the service chain?

Firewall

WAF

LoadBalance

NIP

2. Which of the following descriptions of the open source OpenStack Glance component is correct?

Modifying an instance that is started based on an image is actually modifying the image

Glance provides the ability to discover, register, and retrieve virtual machine images

Virtual Machine Instance images provided by Glance can only be placed in object storage provided by Swift

You can launch only one instance from the same image

3. An MPI collection operation is when all processes in a communication space work together to accomplish a specific data operation and transmission.

Which of the following items fall into a common collection action type?

MPI_Scatter

MPI_AllReduce

MPI_Gather

P2P

4. Which of the following components in Huawei's intelligent lossless network solution architecture for multi-computing scenarios offloads the RDMA input layer and the following protocol stacks to the NIC hardware, so that peripherals can directly access the memory of the remote host?

NIC driver

SmartNIC

Network equipment

iMasterNCEFabric

5. Which of the following device statistics cannot be viewed in the device management of iMaster NCE-Fabric?

switchboard

router

firewall

server

6. What is correct about the following description of Docker?

Image in Docker can be regarded as a special file system, which only provides the programs required by the container runtime, and the libraries, resources, configurations, and other files required by the container runtime are hosted by the host Machine OS provides

The Docker engine obtains the image from the repository and runs the container on the corresponding host

Image files are stored centrally in a repository and can be public or private

Docker containers are created based on images, and a running container is a process running on a Docker host

7. Which of the following describes the error in the CloudFabric network virtualization scenario?

Network administrators control the network through iMaster NCE-Fabric

When the compute administrator creates the VM, select the PortGroup for the corresponding network

Compute administrators manage compute resources through VMM

iMaster NCE-Fabric obtains the connection between the host and the TOR port through VMM

8. When the cloud platform creates a VM resource, it needs to call multiple components, such as Nova, Cinder, Glance, etc., and the authentication and authentication between the components depends on which of the following options?

Freezer

Watcher

Keystone

Zun

9. In Huawei's CloudFabric solution, in the scenario where the Border Leaf and Service Leaf are separated, what are the correct descriptions of the following principles for traffic orchestration between internal and external networks?

The controller creates the corresponding tenant VRF and egress VRF on the Border Leaf based on the tenant network and the external network

The route to the external network on the border leaf is delivered by the iMaster NCE-Fabric controller, and only static routes can be delivered to connect with the external network

The controller creates the corresponding tenant VRF and egress VRF on the Service Leaf based on the tenant network and the external network

The backhaul route from the external network to the tenant network needs to be configured by the external network and cannot be delivered by the iMaster NCE-Fabric controller

10. Runbook action (An action is composed of multiple steps, in which of the following APIs should each step be required??)

RESTful

NETCONF

OpenFlow

gRPC

Page 2 of 8

11. Which of the following falls under the technical layer of the AI industry?

Autonomous driving

machine learning

artificial intelligence

robot

12. Which of the following server components is used as a temporary place to store program instructions, data, and intermediate results during computation?

memory

hard disk

flash memory

CPU

13. As shown in the figure in the Multi-PoD solution of the CloudFabric solution, in the active/standby egress scenario, when the Border Leaf is the primary failure, the VM belonging to VPC1 is located.

What traffic path will be used to access the external network?

14. Which of the following IPv6 transformation solutions for data center networks only needs to transform the egress gateway to support IPV4/IPv6 dual-stack services, which requires less transformation effort and less impact on existing network services?

Dual-stack renovation scheme for Internet access area

Create an IPv6 single-stack solution for Internet access zones

Export NAT64 retrofit scheme

Dual-stack transition and transformation scheme for Internet access area

15. Which of the following protocol standards is led by Huawei to solve the PFC head-resistance problem?

IEEE 802.1AB

IEEE P802.1CQ

IEEE 802.1Qcp

IEEE P802.1Qcz

16. Which of the following types does the iMasterNCEFabricRunbook work contain?

Retry

Rollback

DryRun

17. Which of the following is not included in the PCIe fabric?

Router

Switch

Root Complex

PCIe Endpoint

18. What are the correct terms of the following descriptions of underlays and overlay networks?

Underlay is logically isolated from overlay, and as long as the routes between tunnel endpoints are reachable, the failure of the underlay network will not directly affect the overlay network

Overlay Routes for the network are generated by routes that are ingested into the underlay network

When implementing the overlay technology in the underlay network, the original underlay network needs to be modified to a certain extent

From the perspective of an overlay network, the underlay network is transparent to devices connected outside of the VXLAN tunnel endpoints

19. What are the correct items in the following descriptions of the design of the CloudFabric intelligent lossless multivariate computing physical network?

You can choose a two-layer or three-layer networking architecture based on the scale

The number of Spine switches needs to be considered based on the total number of upstream interfaces across all Leaf switches

Leaf switches can be deployed independently

To ensure high reliability on the access side, the server must be single-homed to the LEAF switch

20. Which of the following types of virtual NICs can be created by the Linux server?

Tun

Tap

Linux Bridge

OVS

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21. Which of the following types of routes does BGPMVPN advertise multicast source information?

Type 1 Routing (Intra-ASI-PMSIA-Droute).

5 Class Routing (SourceActiveA-Droute).

6 Class Routing (Share Tree Join route).

7 Class Routing (SourceTreeJoinroute).

22. Which of the following is wrong in the description of communication between VMs in a DVS distributed virtual switch environment in server virtualization?

VMs in the same port group, if they are on different hosts, can reach DVS on the destination host through the uplink of DVS and finally complete communication with the remote VM

VMs in different port groups (belonging to different VLANs) need to go through the uplink of the DVS to the physical switch, through which the VLAN is implemented Communications

VMs in the same port group, if they are in the same host, can communicate directly via DVS

VMs that are in different DVSs but belong to the same VLAN port group can communicate directly over DVS

23. In an HPC solution, which of the following nodes is typically installed on a GPU?

Accelerate the node

Fat nodes

MPI node

24. Which of the following components of open-source OpenStack provides a Dashboard for users to use?

Cinder

Heat

Horizon

Keystone

25. Which of the following is not part of the analysis scope of the iMaster NCE-FabricInsight network snapshot function?

BGP and OSPF protocols

Device startup configuration

Number of packets lost on the interface

ARP entries

26. In the Huawei CloudFabric solution, the network controller uses the NETCONF device to deliver configurations.

Which of the following encodings does NETCONF information use?

XML

HTML

JSON

PROTOBUF

27. Which of the following describes the error of the three-level rollback function supported by iMaster NCE-Fabric?

Network-wide rollback allows you to roll back the entire network configuration to before the configuration change to quickly restore services

The three-level rollback function supports manual backup and automatic backup, and supports automatic recovery when the network is abnormal

Tenant snapshots are backups and restores of the network at tenant granularity

Service rollback supports single-point service recovery

28. In Huawei's CloudFabric solution, if you want to use a third-party VAS device to provide value-added services, which of the following VAS device management modes should you use if the VAS device cannot be managed by the controller?

Service Policy

Network Policy

Service Manager

Network Manager

29. In the process of open and programmable evolution of CloudFabric network services, APIs evolve from atomic APIs to network service APIs and then to intent APIs

Which of the following is a web service API?

RESTful API

RESFCONF API

NETCONF API

Service Chain API

30. Which of the following in server virtualization provides a user interface, has functions such as monitoring and managing virtualized resource pools, simplifying virtual machine management processes, and configuring resource scheduling policies and execution rules?

Hypervisor

Virtualization management platform

Virtual machines

Host OS

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31. If a company provides services with large bursts of traffic, large gaps in business needs between peaks and valleys, and a wide distribution of users, which of the following methods should the company adopt to deploy its services based on cost and user experience considerations?

Intra-city active-active

Two places and three centers

Hybrid cloud

Edge DC

32. In the computing linkage scenario of the CloudFabric solution, when the VM is wired, iMasterNCEFabric senses the port on which of the host connects to the leaf point through which of the following protocols?

LLDP

NETCONF

HTTP

gRPC

33. Network-wide intelligent O&M is a feature of Huawei's CloudFabric solution, which provides intelligent O&M compared with traditional device-centric O&M

It is centered on which of the following, minutes Level of identifying cyber risks?

Business

Configuration

Hardware

Agreement

34. Which of the following descriptions of firewalls is wrong when deploying a data center network?

After different security zones are divided on the firewall, the different security zones are isolated by default

Firewalls can be deployed alongside Border Leaf to control secure access to incoming and outgoing traffic

The firewall can be managed through SecoManager, but the service needs to be configured manually

Firewalls can be deployed in active and standby image mode to enhance reliability

35. Which of the following descriptions of the RTT requirements between different PoDs is correct in the Multi-PoD scenario of the CloudFabric solution?

No more than 50ms

No more than 100ms

No more than 10ms

No more than 1s

36. Which one is wrong in the description of calico, the networking solution for Kubernetes?

Felix is primarily used to store the metadata of the calico and to serve as a communication hub for the various components of the calico

Think of the server running the container as a router, and then run the specified routing protocol on the router

In large-scale networking, a route reflector is used to synchronize pod routes across the network

Use BGP as the routing protocol

37. Centralized storage generally provides data storage by the storage array, which of the following components does the storage array contain?

Power module

controller

Hard disk enclosure

Interface modules

38. Which of the following descriptions of the business chain is wrong?

In the NSH implementation, the service chain function is implemented by inserting the NSH header into VXLAN packets

In the PBR implementation, the controller delivers PBR diversion policy routes to SFF and SC nodes hop-by-hop through NETCONF

In PBR implementation, the controller delivers filtering and redirection policies to the SC nodes to selectively redirect service traffic

In the NSH implementation, the SF node must support NSH

39. In a data center network, which of the following technologies can be used to achieve sub-second data collection?

SNMP

Telemetry

NETCONF

RESTCONF

40. After the dual-stack transformation of the Internet access area of the data center network, which of the following methods can the network egress choose to interconnect with the operator's IPv network?

Static IPv6 routes

OSPFv3

IBGP4+

EBGP+

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41. Which of the following terms is NOT a hard disk media?

SAN

SCM

SSD

HDD

42. In which of the following storage network architectures does the storage array provide file storage to the server?

DAS

IP SAN

NAS

FC SAN

43. Which of the following is not within the scope of the iMaster NCE-FabricInsight protocol layer health assessment?

OSPF connection

BGP peer connection

M-LAG group status

VXLAN tunnels

44. Which of the following types of network overlay networking does the CloudFabric solution consist of?

Hub-Spoke

Full-mesh

Centralized gateways

Distributed gateways

45. Which of the following descriptions of container technology and virtual machine technology is wrong?

Container images are smaller than virtual machines

Containers start up faster than virtual machines

Containers don't need separate kernels

Containers are more isolated than virtual machines

46. Which of the following components of open-source OpenStack provides management services for the lifecycle of bare metal servers?

Ironic

Nova

Horizon

Heat

47. Centralized storage generally provides data storage by the storage array, which of the following components does the storage array contain?

Power module

controller

Hard disk enclosure

Interface modules

48. In the container network scenario of the CloudFabric solution, when the container accesses the network through the L3 route mode, which of the following components establishes a BGP neighbor relationship with the ToR?

CNI Plugin

vRouter

bird

etcd

49. Which of the following does not support cross-site L2 interoperability in the Multi-Site interconnection scenario of the CloudFabric solution?

VLAN Hand-off

L3 Underlay

End-to-end VXLAN

Segment VXLAN

50. In a CloudFabric multi-computing lossless network, if a device wants to remove the PFC deadlock by not responding to a backpressure frame, which of the following lossless functions needs to be deployed?

PFC deadlock prevention

PFC deadlock detection

AI ECN

DCQCN

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51. Which of the following is the role of SI in the NSH service chain?

The path number of the service chain

Used to indicate the next-hop IP address

Used to prevent loops

The SI value can be used to calculate the number of business function points that are currently eclips

52. Which of the following options are included in the action type of a runbook in the CloudFabric network business open programmable overall solution?

Rollback

WithDraw

Commit

DryRun

53. Device configuration parameters can be adjusted when using the edge intelligence function of iMaster NCE-FabricInsight for specified stream analysis.

Which of the following device configurations cannot be automatically delivered during UDP specified stream analysis?

Active aging time

ACL Number

Whether the VXLAN packet is matched

Whether to match TAG packets with a layer 1 VLAN

54. iMaster NCE-Fabric provides an intelligent event function based on user intent, which can close the loop on fault events.

Which of the following is a closed-loop approach to business failures?

This section displays the details of the abnormal re-insurance flow monitoring

Notify the user of a failure

Provide a remediation plan

Fix the network configuration associated with an unknown link

55. Which of the following is the destination MAC address of the PFC backpressure frame?

0180-c200-0001

0280-c200-0001

0100-5e00-0003

0080-c200-0002

56. When service packets are connected to a VXLAN network through a Layer 2 sub-interface, different flow encapsulation types need to be configured on different Layer 2 sub-interfaces.

The same physical interface can access different data packets.

Which of the following is NOT a stream encapsulation type that is supported by a Layer 2 sub-interface?

QinQ

Untag

Dotlq

Trunk

57. Which of the following descriptions of the VPC routing table in the AWS public cloud model is wrong?

By default, subnets associated with different route tables within the same VPC are isolated from each other

The main route table is the route table that comes with the VPC, and the subnet in the VPC is associated with the main route table by default

A VPC can have one or more VPC route tables in a VPC

Each subnet needs to be associated with a VPC routing table that guides the routing and forwarding of EC2 instances within that subnet

58. How many core-layer switches are required in a typical 4-element Fat-Tree topology in an HPC solution?

59. In the CloudFabric solution, iMaster NCE-Fabric supports network O&M based on physical topology.

When the color of a device in a physical topology is red, which of the following meanings is indicated?

The device is offline

There is an emergency alarm

Both the device and the link are normal

The link is disconnected and a non-emergency alarm exists

60. Which of the following descriptions of distributed training is wrong?

In data parallelism, each computing node trains the complete model based on local data

Distributed training can support the training of massive data and complex models

Data parallelism and model parallelism are common distributed training methods

In model parallelism, each compute node will only interact with the trained sub-model and obtain the final model through model aggregation

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61. Based on the multiple computing scenarios of Huawei' s CloudFabric intelligent lossless network solution, what are the correct descriptions of HPC cluster network design?

The HPC cluster network adopts a planar design that considers the business plane, management plane, and computing plane separately

High-performance computing networks are used for communication between computing nodes, requiring networks with low latency and high throughput, and are generally deployed as lossless networks

The service management network is used for cluster management, resource monitoring, and other related business operations, and is usually deployed as a TCP/IP lossy network

Both the high-performance computing network and the storage front-end network must be deployed independently to ensure high network performance and prevent mutual interference

62. iMaster NCE-Fabric supports the three-level rollback function, which of the following refers to the backup and rollback of a single point of service of a single tenant?

Network-wide rollback

Configure rollback

Tenant rollback

Business rollback

63. In micro segmentation, if the EPG packet information corresponding to the source IP exists in the source leaf, there is no EPG packet message corresponding to the destination IP on the destination side Which of the following behaviors is correct?

On the target side, the leaf matches the default access control policy of the EPG group members

On the source side, Leaf matches the default access control policy of the EPG group members

On the source side, the leaf matches the default access control policy of the unknown EPG group member

On the target side, the leaf matches the default access control policy of the unknown EPG group member

64. When packet loss occurs in a CloudFabric data center network, which of the following operations does the network administrator need to do first?

Fault isolation

Fault demarcation and positioning

Confirm the fault information

Troubleshooting

65. Which of the following needs to be configured in OpenStack when configuring intranet cross-VPC access (over the wall) in OpenStack?

Networking

Routing

VPC interworking

Specify the source firewall

66. What is wrong in the following description of the open source OpenStack Nova workflow?

Nova-API uses a RESTful API to tell Nova-Schedule to select a physical server

Nova-Schedule will perform two steps of Filter and Weight when allocating compute nodes

By default, Nova-Schedule uses the number of CPUs as the weight value of the physical machine to select the optimal physical machine

The user's virtual machine operation request is passed to the Nova component via the Nova API

67. Which of the following descriptions of RDMA is wrong?

RDMA requires the host CPU to participate in multiple copies of protocol stack memory, resulting in a sustained high load on the CPU

Unlike traditional TCP socket network interfaces, RDMA bypasses the operating system kernel and implements kernel bypass

RDMA technology is widely used in scenarios such as HPC, AI, and storage, reducing CPU load and processing latency, and greatly improving application performance

RDMA enables peripherals (such as network cards) to directly access the memory of the remote host

68. For CloudFabric-based data center networks, the iMaster NCE-Fabric controller can be used to connect network devices for service delivery and configuration management.

Which of the following is NOT the southbound interface between the controller and the network device?

NETCONF

OpenFlow

gRPC

RESTful

69. What are the correct descriptions of VXLAN Overlay multicast in the following descriptions?

BGP NG MVPN carries I-PMSI information for I-PMSI tunnel establishment

There is no need to deploy multicast in the underlay

When deploying multicast using PIM-SM mode, separate RPs need to be deployed on both the underlay and the overlay

The VXLAN tunnel can still be configured as headend replication without special configuration

70. The CPU command defines a hierarchical protection domain, in which of the following levels has the highest authority to directly operate the hardware?

Ring0

Ring1

Ring2

Ring

Page 8 of 8

71. At which layer of headers is the ECN tag located in the message?

TCP layer header

Ethernet layer header

IP Layer Header

UDP layer header

72. Linux systems are divided into user space and kernel space, which of the following types of data encapsulation is not completed in kernel space?

Physical layer encapsulation

Transport layer encapsulation

Data link layer encapsulation

Network layer encapsulation

HCIE-Data Center Network H12-921_V1.0 Written Exam Dumps

HCIE-Data Center Network H12-921_V1.0 Written Exam Dumps

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