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Question 74 - CWNA-109 discussion

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

Explanation:

WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally. A WLAN bridge is a device that connects two or more networks using the 802.11 protocol. A WLAN bridge must have a clear and strong signal between the two endpoints to ensure reliable and fast data transmission. The signal-to-noise ratio (SNR) is a measure of the quality of the signal, which depends on the distance, interference, obstacles, and antenna gain between the transceivers. A higher SNR means a better signal quality and a higher data rate. A lower SNR means a worse signal quality and a lower data rate.Therefore, a WLAN bridge must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally1.

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asked 16/09/2024
wendy brouwer
38 questions
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