CWNP
CWAP-403 · Question #45
CWAP-403 Question #45: Real Exam Question with Answer & Explanation
The correct answer is C. The contention window approximately doubles in size.. See the full explanation below for the reasoning.
Question
An HT STA does not receive an ACK for a first-attempt data frame that it transmitted. Assuming this STA is not using BlockAcks in this case, what happens to the HT STA's EDCA contention window?
Options
- AThe slot time within the contention window decreases by 50%.
- BIt varies because the backoff algorithm is random.
- CThe contention window approximately doubles in size.
- DThe contention window is not affected by failed Data frame delivery.
- EThe contention window is immediately closed, and the frame is retransmitted.
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