Free Certified Wireless Design Professional CWDP-304 Exam Dumps

1. In an RSN requiring low-latency reassociations and no fast secure roaming protocols, what security solutions are ideal for protecting VoWiFi communication? (Choose all that apply.)

2. To increase capacity in a coverage-based wireless network, which of the following techniques are typically recommended? (Choose all that apply.)

3. Who should be in the final meeting from the customer-side after successfully implementing a WLAN infrastructure?

4. SSID hiding is not generally recommended because some frames require inclusion of the SSID. In what frames is the SSID always included?

5. Given: You are evaluating the theoretical and real-world RF gain benefits of transmit and receive features introduced by 802.11 with MIMO. This exercise allows you to quantify the features value in a real-world environment.

What is the maximum theoretical signal gain of chip-based TxBF and MRC (as features) when compared to the same AP using only a single antenna for transmit and receive (effectively simulating a 1x1 chip)?

6. What functions may be performed by a WIPS? (Choose all that apply.)

7. What are the two types of WLAN discovery/scanning?

8. A museum wants to offer Wi-Fi to its visitors. One of their requirements is to have the APs blend into the design of the museum.

What should you do to meet this requirement?

9. What architecture suffers the biggest limitation for sharing control information across APs?

10. While performing a validation site survey, you realize that overlapping channels are being used on the 2.4 GHz bad due to the automatic channel assignment algorithm of the WLAN infrastructure.

What should you do to prevent this?

11. After designing a WLAN infrastructure using predictive design software.

What's the best way to validate the predictive design in the physical space before deployment, if time and budget allow for it?

12. Of the following antenna connector types, which one is the smallest?

13. Which document provided to your customer should include all devices and parts that are going to be used during the deployment of their WLAN infrastructure?

14. An associated STA detects a new BSS with the same SSID as the STA's current BSS. The new BSS uses a different IP subnet than the current BSS.

If the STA is configured to use 802.1X/EAP preauthentication, what is likely to occur?

15. A business traveler from North America is in Europe. The hotel only provides coverage in 2.4 GHz. The traveler connects to the hotel's SSID and notices an AP in the hotel room.

However, the laptop reports a very low RSSI when connected. The traveler does not have the same problem when connecting in the lobby.

What would be the most likely cause of the low RSSI in the hotel room?

16. A wireless network with fewer APs at higher power levels to cover a large area is said to be which of the following?

17. In a manufacturing facility with highly reflective materials, you are planning an upgrade to your existing 802.11b WLAN implementation. You have chosen a dual- band 802.11n infrastructure product for this purpose.

Your client applications include:

- Handheld scanners for inventory management

- Toughbooks (laptops) mounted on forklifts for inventory and workflow management

- VoWiFi phones used by select employees throughout the facility

You are evaluating all of the 802.11n enhancements and determining which features to enable for your environment and applications.

In this scenario, what 802.11n enhancement typically should NOT be enabled on the 2.4 GHz radio of the new APs?

18. Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging wireless network infrastructure, as well as some clients, to support 802.11ac. In your research, you have discovered that your new wireless client devices and infrastructure are 802.11ac,

WMM, and WMM-PS certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not support WMM.

Given this information, what scenario is possible when your company's employees begin using both types of client devices on the new WLAN?

19. During a post-deployment verification, you are requested to troubleshoot an area where users are experiencing poor throughput. They are using data communication only, mainly from laptops. You captured the frame showing an incorrect FCS. This frame is typical of those that were captured by the analyzer.

What does this frame reveal about the RF network in this area?

20. You are testing a VoWLAN deployment, and your communication measurements show a certain amount of lost packets.

What would be an acceptable packet error rate value to still provide acceptable call quality?

21. The thermal noise is at 174 dBm/Hz. A spectrum analyzer has a resolution bandwidth of 1 kHz and a 5 dB noise figure.

What is the level of the noise floor?

22. In this question, you will compare the mobility processes of a network that supports WPA2-Personal and WPA2-Enterprise. Assume the use of a 15-character ASCII passphrase for WPA2-Personal and EAP-TTLS/MSCHAPv2 with WPA2-Enterprise. Also, assume that proprietary roaming protocols are not supported.

When a device transitions from one BSS to another within the same ESS, what step must be performed in the WPA2-Enterprise transition that are not performed in the WPA2-Personal transition?

23. Which definition correctly describes the "local MAC" variation of the centralized WLAN architecture?

24. In what circumstance would you not enable DFS channels on a WLAN infrastructure?

25. While configuring your site survey software for an upcoming manual survey project, you notice the configuration option for "Network Card Simulation".

What is the purpose of such a feature and when would you use it?

26. Modulation can be defined as:

27. One of your warehouse customers called you reporting problems with their WLAN in some locations that you designed and installed over a year ago.

What should be one of your first considerations for your line of questioning?

28. You are on site, planning a network at a freight shipping company on a busy harbor. Since the preliminary WLAN design specifies support for the 5 GHz spectrum, you would like to test for radar pulses to determine if DFS channels should be supported at this facility. As a part of your spectral survey with a laptop-based analyzer, you include DFS testing to identify the presence of radar. This is done by manually observing Real-time FFT, Duty Cycle, and Active Devices charts of the spectrum analyzer software.

What potential drawback is present with this DFS test method?

29. You're about to deploy an Enterprise-class VoWLAN infrastructure. You need to ensure that QoS is properly configured throughout the network.

What Access Category (AC) should voice frames/packets use?A. AC_VI

B. AC_VO

C. AC_BE

D. AC_BK

30. You are using site software design features. You have imported a floor plan, but the simulated RF coverage is nowhere close to the real RF coverage you see with a walkabout.

Given that the simulation is significantly different, when step was likely missed when using the software?

31. What statements are true regarding jitter and latency? (Choose all that apply.)

32. What VoWiFi implementations frequently require multicast packet delivery support by the WLAN infrastructure?

33. What factors are key features when designing a guest network for a large enterprise? (Choose all that apply.)

34. A business traveler from North America is in Europe. The hotel only provides coverage in 2.4 GHz. The traveler connects to the hotel's SSID and notices an AP in the hotel room. However, the laptop reports a very low RSSI when connected. The traveler does not have the same problem when connecting in the lobby.

What would be the most likely cause of the low RSSI in the hotel room?

35. ABC Company has a WLAN controller with 10 controller-based APs; the Voice SSID is configured for centralized data forwarding. Each AP is connected to an access port on a layer-2 Ethernet switch. Each layer-2 switch is uplinked to a single layer-3 core Ethernet switch. The WLAN controller is connected directly to the layer-3 core Ethernet switch. Layer-3 tunnels are created between all controller-based APs and the WLAN controller. A voice server is connected to the layer-3 Ethernet switch.

When a voice-enabled QoS STA sends an IP data packet to a voice server in this scenario, the DSCP value carried in the STA's IP data packet gets mapped to what and by which device?

36. What important item is often left out of operational and maintenance plans?

37. In the enterprise, when is WPA/WPA2-Personal generally a recommended solution? (Choose all that apply.)

38. During your first pre-deployment meeting with the deployment team, you hand out the full design documentation to all of them.

What's your primary goal during this meeting?

39. What kind of antenna results in a nearly circular pattern on the azimuth chart but a very flat donut shape on the elevation chart?

40. Given: For this fill-in the blank question, each answer option contains an answer for the first and second blanks, separated by a dash "―". Choose the answer option that correctly fills in both blanks in the following sentence.

A WLAN may use 802.11 admission control to ________, and admission control requirements are configured separately for each ________.

41. For what types of systems should you request read-only access to in order to perform an analysis of the customer’s existing infrastructure? (Choose all that apply.)

42. What strategy can be used to ensure efficient cell overlap for VoIP site surveys?

43. How are EAP messages transported over 802.11 wireless LANS?

44. As a device starts to shift to lower PHY rates, what factors usually influence a device decision to shift to lower PHY rates? (Choose all that apply.)

45. In high-density environments, such as stadiums and convention centers, what extra factor has to be taken into account that can attenuate Wi-Fi signals when these environments are having an event?

46. In your company’s WLAN, you expect to have a mixed client PHY environment and plan to use protection mechanisms. The protection mechanism used by your client devices is configurable.

What is the best protection mechanism for backward compatibility of 802.11n devices with 802.11b devices?

47. What is the chip rate of 1 Mbps 802.11b?

48. What is the purpose of DHCP Option 43, and how is it used with WLANs?

49. For what purposes are VPNs typically used in modern WLANs? (Choose all that apply.)

50. You are conducting a physical site survey where heavy machinery is repaired.

What is a common item required specifically for this type of survey?

51. When designing a WLAN to support voice in a large office, which design element is of the highest concern for performance?

52. As you plan a WLAN upgrade, you have assessed the network requirements and data signatures of your applications. One of the popular applications used on your network requires high bandwidth and low to medium Wi-Fi loss, but can tolerate moderate latency and jitter.

What application matches this description?

53. When deploying a new WLAN infrastructure using PoE to power the APs, you realize that a known good AP is not powering up. You use the same cable to connect your laptop and connect without any trouble.

What is the most likely reason the AP did not power up?

54. A table of VLANs in a _________ document should include what device performs ________ services. (Fill in the blanks)

55. You are creating an outdoor bridge link that spans more than 1000 yards.

Which one of the following antenna types is more likely to be included in the design?

56. A bandpass filter has a maximum in-band loss of 1.5 dB, ripple of 0.4 dB, and a return loss of 15 dB.

What is the minimum in-band loss?

57. An engineering firm just upgraded their WLAN form nine 802.11n APS to nine 802.11ac APs. After this upgrade, they did not see any improvement in throughput.

What is the most likely cause of this result?

58. When deploying APs outdoors, what additional component needs to be used that is not needed indoors?

59. What is the meaning of a Real Time FFT graph?

60. You are planning for client devices in a WLAN that is be upgraded to 802.11ac.

Which one of the following devices is more likely to have support for 3x3:3 radios and 256 QAM?

61. Your customer requires a security solution in which client credentials are used and the authentication server must have a certificate with optional client certificate use.

Which EAP method would be the best fit for their requirement?

62. Which of the following is not a business requirement?

63. When designing a static channel plan for an office using voice devices near an airport, which range of channels should be avoided to ensure optimal performance when implemented?

64. You and 10 other people are connected to a public hot-spot. You issue a ping sweep on the network, but you can't find any devices on the same subnet as yours.

What feature might be enabled on the WLAN infrastructure that is preventing you from communicating with other devices on that subnet?

65. Before performing a pre-deployment passive RF survey of a new deployment using survey mapping software, which of the following must be performed?

66. What is the most cost-effective way to accurately measure the height of a ceiling when ladder use is not allowed?

67. You have performed a validation site survey after deploying a WLAN infrastructure that is an All-Wireless-Office. One specific application of your customer is experiencing delay when using the application after moving from wired connectivity. After your validation, you realized that all APs are using 80 MHz channel- widths instead of 20 MHz on the 5 GHz band, as it was designed.

What can be done to resolve the delay on this application?

68. Which type of authentication and encryption method is mandatory for Voice Enterprise certified devices as specified by the Wi-Fi Alliance?

69. When surveying an existing WLAN infrastructure for a possible redesign, you use two Wi-Fi USB adapters to collect RSSI data and two USB spectrum analysis adapters to collect RF spectrum data. Since your laptop doesn't have enough USB ports, you use a 4-port powered USB 3.0 hub.

What issues could be caused by the use of USB 3.0 that will impact your site survey?

70. ABC Manufacturing has a heavily-used dual-band (2.4 / 5 GHz) WLAN, but sporadic RF interference across the 2.4 GHz band is causing dropped VoWiFi calls and leading to data connectivity and throughput problems.

In addition to avoiding 2.4 GHz channels and installing a distributed spectrum analyzer to locate RF interference sources, what should the implementer do to resolve the problem fully?

71. When using a predictive design tool, you have selected APs with an antenna gain 3 dBi and set the transmit power of the predicted APs to 25 mW.

What should be EIRP of the APs in the design?

72. In your company’s WLAN, you expect to have a mixed client PHY environment and plan to use protection mechanisms. The protection mechanism used by your client devices is configurable.

What is the best protection mechanism for backward compatibility of 802.11n devices with 802.11b devices?

73. A museum wants to offer Wi-Fi to its visitors. One of their requirements is to have the APs blend into the design of the museum.

What should you do to meet this requirement?

74. What is the minimum PoE budget needed on a switch to support 6 (six) APs that can only be powered using IEEE 802.3at if no other details are provided?

75. A customer is acquiring a new VoWLAN system to replace their existing wired phone system. When reading about his system's requirements, you learned that is requires 25 db of SNR to work as expected. After surveying the environment, you discovered that the noise floor is -88 dBm.

What should be the minimum RSSI value to meet the system's requirements?

76. Name the audience type not addressed in this chapter for HLDs.

77. When implementing WLAN security according to common best practices, what feature should be enabled when configuring an EAP type?

78. Given: You are evaluating the theoretical and real-world RF gain benefits of transmit and receive features introduced by 802.11 with MIMO. This exercise allows you to quantify the feature’s value in a real-world environment.

What is the maximum theoretical signal gain of chip-based TxBF and MRC (as features) when compared to the same AP using only a single antenna for transmit and receive (effectively simulating a 1x1 chip)?