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Question 47 - CWNA-109 discussion

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What is appended to the end of each 802.11 data frame after the payload?

A.
Preamble
Answers
A.
Preamble
B.
MAC header
Answers
B.
MAC header
C.
PHY header
Answers
C.
PHY header
D.
FCS
Answers
D.
FCS
Suggested answer: D

Explanation:

The FCS (Frame Check Sequence) is appended to the end of each 802.11 data frame after the payload. The FCS is a 4-byte field that contains a CRC-32 (Cyclic Redundancy Check) value that is calculated based on the contents of the MAC header and the payload of the frame. The FCS is used by the receiver to verify the integrity of the frame and to detect any errors or corruption that may have occurred during transmission. If the FCS does not match with the expected value, the frame is discarded by the receiver.Reference:, Chapter 4, page 139; , Section 4.2

asked 16/09/2024
Juli Santo
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