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CWNA-108 Online Practice Questions and Answers

Questions 4

You were previously onsite at XYZ's facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post- deployment validation survey.

When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?

A. Spectrum analysis to locate and identify RF interference sources.

B. Frequency-band hopping analysis to detect improper RF channel implementations.

C. Application analysis with an active phone call on an VoWiFi handset.

D. Protocol analysis to discover channel use on neighboring APs.

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Questions 5

What is the most effective method for testing roaming in relation to 802.11 VoIP handsets?

A. Use a spectrum analyzer to monitor RF activity during a VoIP call.

B. Use a protocol analyzer to capture the traffic generated when a laptop roams.

C. Place a call with the handset and move around the facility to test quality during roaming.

D. Use the built-in roaming monitor built into all VoIP handsets.

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Questions 6

What cipher suite is specified by the 802.11-2016 standard and is not deprecated?

A. Wired Equivalent Privacy

B. Temporal Key Integrity Protocol

C. Counter Mode with CBC-MAC Protocol

D. Extensible Authentication Protocol

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Questions 7

You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not used and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. What should be inspected to verify proper configuration?

A. NTP

B. BOOTH

C. DNS

D. AP hosts file

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Questions 8

In a mesh BSS (MBSS), according to the 802.11-2016 standard, what device connects the mesh to an Ethernet network?

A. Mesh Gate

B. Mesh Switch

C. Mesh Router

D. Mesh Portal

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Questions 9

When replacing the antenna of a WLAN device with a similar antenna type that has a higher passive gain, what antenna characteristic will decrease?

A. Range

B. Beam width

C. Active gain

D. Receive sensitivity

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Questions 10

You are installing an AP to be used by 23 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

A. Channel 6, because it is always best to use this channel

B. A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision

C. Channel 1, because it is best to use the channel with the lowest frequency

D. Channel 11, because channels 1 and 6 are in use nearby

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Questions 11

You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not use and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. What should be inspected to verify proper configuration?

A. NTP

B. BOOTH

C. DNS

D. AP hosts file

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Questions 12

What terms accurately complete the following sentence?

The IEEE 802.11-2016 standard specifies mandatory support of the _______________ cipher suite for Robust Security Network Associations, and optional use of the ________________ cipher suite, which is designed for use with pre-RSNA hardware and is deprecated.

A. 802.1X/EAP, WEP

B. CCMP, TKIP

C. TLS, SSL

D. RC5, RC4

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Questions 13

What security method is commonly used for VoIP handsets when the infrastructure does not support OKC or FT roaming?

A. WPA2-Enterprise with EAP-TTLS

B. WPA2-Enterprise with EAP-TLS

C. WPA2-Enterprise with PEAP

D. WPA2-Personal

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Questions 14

In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network data rate (e.g. 216.7 Mbps) for user data when multiple clients are actively exchanging data with the AP?

A. Half of the bandwidth is allocated to uplink traffic and half to downlink traffic

B. All data frames must be acknowledged and the medium is shared

C. Radio receiver hardware cannot process data is quickly as it can be transmitted

D. APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections, with 802.11n and earlier APs

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Questions 15

The IEEE 802.11-2016 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?

A. ERP-PBCC

B. DSSS

C. OFDM

D. HR/DSSS

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Questions 16

You are attempting to explain RF shadow and how it can cause lack of coverage. What common building item frequently causes RF shadow and must be accounted for in coverage plans?

A. Wooden doors

B. Carpeted floors

C. Elevators

D. Cubicle partitions

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Questions 17

A client STA must choose the best AP for connectivity. As part of the evaluation, it must verify compatible data rates. What can the client STA use to verify that an AP supports the same data rates that it supports?

A. Beacon frames transmitted by the AP

B. Data frames sent between the AP and current client STAs

C. Authentication frames transmitted by the other client STAs

D. Probe request frames transmitted by other client STAs

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Questions 18

You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIds, which are different than the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?

A. Interference from non-Wi-Fi sources

B. Faulty drivers

C. DoS attack

D. Interference from other WLANs

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Exam Code: CWNA-108
Exam Name: Certified Wireless Network Administrator
Last Update: Mar 21, 2024
Questions: 181 Q&As

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