CWNA: Certified Wireless Network Administrator v107 — Question 39

What statement about 802.11 WLAN bridges is true?

Answer options

• 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

Explanation

Option C is correct because WLAN bridges can utilize MIMO communications specifically in the 5 GHz band. Option A is incorrect as WLAN bridges can operate in both 2.4 GHz and 5 GHz frequencies and may also support MIMO. Option B is wrong because while maintaining SNR is important, the statement does not specify the MIMO capability relevant to the frequency band. Option D is not entirely accurate since some level of interference may be tolerated depending on the bridge's design and the environment.