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CWNP CWNA-107: Certified Wireless Network Administrator (CWNA)

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Question 1

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

A. For each probe request frame, only one AP may reply with a probe response.

B. Each AP responds in turn after preparing a probe response and winning contention.

C. Each AP checks with the DHCP server to see if it can respond and then acts accordingly.

D. After waiting a SIFS, all APs reply at the same time with a probe response.

Correct Answer:B

Question 2

What statement about 802.11 WLAN bridges is true?

A. WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

B. WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

C. WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band

D. WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

Correct Answer:C

Question 3

A string of characters and digits is entered into an AP and a client STA for WPA2 security. The string is 8 characters long. What is this string called?

A. MSK

B. WEP key

C. Passphrase

D. PSK

Correct Answer:C
http://www.arubanetworks.com/techdocs/ArubaOS_64x_WebHelp/Content/ArubaFrameStyles/VirtualAPs/SSID

Question 4

When implementing PoE, what role is played by a switch?

A. PD

B. PSE

C. Midspan injector

D. Power splitter

Correct Answer:B

Question 5

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

Correct Answer:D

Question 6

What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?

A. Increasing or decreasing the number of spatial streams in use by the client station and AP

B. Implementation of several other clients in the same BSS using 802.11 g radios

C. Implementing Fast BSS Transition (FT) for roaming

D. RF interface from more than 10 nearby Bluetooth transmitters

Correct Answer:A

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