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CWNP Exam CWAP-404 Topic 1 Question 20 Discussion

Actual exam question for CWNP's CWAP-404 exam
Question #: 20
Topic #: 1
[All CWAP-404 Questions]

What is the function of the PHY layer?

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Suggested Answer: A

RTS is not a valid acknowledgement frame. RTS stands for Request To Send, and it is a control frame that is used to initiate an RTS/CTS exchange before sending a data frame. The purpose of an RTS/CTS exchange is to reserve the medium for a data transmission and avoid collisions with hidden nodes. An acknowledgement frame is a control frame that is used to confirm the successful reception of a data frame or a block of data frames. The valid acknowledgement frames are CTS (Clear To Send), Ack (Acknowledgement), and Block Ack (Block Acknowledgement) . Reference: CWAP-404 Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 186; CWAP-404 Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 187; CWAP-404 Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 189; CWAP-404 Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 190.


by Alyce at Sep 14, 2024, 05:26 PM

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Silva
2 months ago
Wait, is the PHY layer responsible for converting the data to and from PPDU format? I thought that was more of a network layer thing. Hmm, I'm just going to guess and hope for the best.
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Viola
2 months ago
Ah, the age-old question of the PHY layer's function. I'm going to go with option A, it just rolls off the tongue better than the others. Plus, who doesn't love a good PPDU-to-PSDU conversion?
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Goldie
26 days ago
User 4: Definitely, option A is the way to go. It's all about those conversions.
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Annelle
28 days ago
User 3: Yeah, option A seems to be the most logical choice. It just makes sense.
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Boris
30 days ago
User 2: I agree, option A sounds right. It's all about that PPDU-to-PSDU conversion.
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Latanya
1 months ago
User 1: I think the function of the PHY layer is to convert PPDUs to PSDUs for transmissions and PSDUs to PPDUs for receptions.
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Vincent
2 months ago
Option C? That can't be right, the PHY layer doesn't deal with MSDUs, that's more of a network layer thing. I'm going with option D, it just makes more sense.
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Leota
2 months ago
Hold up, I'm pretty sure the PHY layer is responsible for the physical encoding and decoding of the data. Option A seems to be the correct answer here.
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Jettie
22 days ago
User 3: Option A sounds like the correct answer then.
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Nathan
29 days ago
User 2: That makes sense, the PHY layer is responsible for physical encoding and decoding.
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Cecily
30 days ago
User 1: I think the PHY layer converts PPDUs to PSDUs for transmissions and PSDUs to PPDUs for receptions.
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Nancey
3 months ago
Hmm, the PHY layer is all about the physical stuff, right? I think option B sounds about right, it's gotta be converting the data frames for transmission and reception.
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Izetta
1 months ago
User 3: Option B makes sense, it's all about converting data frames for transmission and reception.
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Oliva
1 months ago
User 2: I agree, the PHY layer deals with the physical transmission of data frames.
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Virgie
2 months ago
User 1: I think option B is correct, it converts MSDUs to PPDUs for transmissions and PPDUs to MSDUs for receptions.
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Iola
3 months ago
I'm not sure, but I think option C could also be a possibility. It involves converting PPDUs to MSDUs for transmissions and MSDUs to PPDUs for receptions.
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Frederica
4 months ago
I agree with Miriam, option A makes sense because the PHY layer deals with the physical transmission of data.
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Miriam
4 months ago
I think the function of the PHY layer is to convert PPDUs to PSDUs for transmissions and PSDUs to PPDUs for receptions.
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