Exam CWNA-109 Topic 4 Question 149 Discussion

Actual exam question for CWNP's CWNA-109 exam
Question #: 149
Topic #: 4
What is appended to the end of each 802.11 data frame after the payload?

Suggested Answer: D Vote an answer

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. References: , Chapter 4, page 139; , Section 4.2

by Morgan at Aug 20, 2026, 11:57 AM

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