What statement about 802.11 WLAN bridges is true?

Question

Options

• AWLAN bridges only work in the 2.4 GHz frequency band and they support only SISO
• BWLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the
• CWLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band
• DWLAN bridges must be implemented such that no interference occurs on the channel anywhere

• A
  2% (1)
• B
  86% (36)
• C
  5% (2)
• D
  7% (3)

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-directionally.

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