CWAP-404 Exam Dumps | What is the function of the PHY Preamble?

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CWNP.CWAP-404.v2024-09-06.q86
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Question 25/86

What is the function of the PHY Preamble?

A. To set the modulation method for the MPDU

B. Allows the receiver to detect and synchronize with the signal

C. To terminate a conversation between transmitter and receiver

D. Carries the NDP used in Transmit Beamforming and MU-MIMO

Correct Answer: B

The function of the PHY preamble is to allow the receiver to detect and synchronize with the signal. The PHY preamble is a part of the PPDU that is transmitted before the PHY header and the PSDU. The PHY preamble consists of a series of training fields that help the receiver to adjust its parameters, such as frequency, timing, and gain, to match the incoming signal. The PHY preamble also helps the receiver to estimate the channel conditions and noise level.

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