CWNA General Information 5

Question 1

In the 2.4 GHz band (IEEE 802.11), how many non-overlapping 20 MHz channels are available in the United States?

Accepted Answer

3

Answer

Only channels 1, 6, and 11 are non-overlapping in the US 2.4 GHz band, making 3 non-overlapping channels available for co-channel interference avoidance.

Question 2

What is the primary function of the 802.11r amendment?

Accepted Answer

Enabling fast BSS transition to reduce roaming latency

Answer

802.11r (Fast BSS Transition) enables clients to pre-authenticate to neighboring APs, dramatically reducing the latency when roaming between APs.

Question 3

Which term describes the practice of a client station selecting the best AP based on RSSI when multiple APs share the same SSID?

Accepted Answer

Roaming

Answer

Roaming is the process by which a client station disassociates from one AP and associates to another AP offering a better signal within the same ESS.

Question 4

What formula is used to calculate the decibel equivalent of a power ratio?

Accepted Answer

dB = 10 × log10(P1/P2)

Answer

Power ratios are expressed in decibels using the formula dB = 10 × log10(P1/P2), where P1 and P2 are the two power values being compared.

Question 5

Which 802.11 management frame is sent by a client station to request access to a BSS after authentication?

Accepted Answer

Association Request

Answer

An Association Request is sent by a client to an AP after the authentication process completes, requesting to join the BSS and share resources.

CWNA - Wireless Network Administrator Practice Test

CWNA - Wireless Network Administrator Practice Test

CWNA General Information 5