CWNP CWSP-207 Exam - Topic 2 Question 29 Discussion

Actual exam question for CWNP's CWSP-207 exam

Question #: 29
Topic #: 2

In the basic 4-way handshake used in secure 802.11 networks, what is the purpose of the ANonce and SNonce? (Choose 2)

AThey are used to pad Message 1 and Message 2 so each frame contains the same number of bytes.

BThe IEEE 802.11 standard requires that all encrypted frames contain a nonce to serve as a Message Integrity Check (MIC).

CThey are added together and used as the GMK, from which the GTK is derived.

DThey are input values used in the derivation of the Pairwise Transient Key.

EThey allow the participating STAs to create dynamic keys while avoiding sending unicast encryption keys across the wireless medium.

Show Suggested Answer

Suggested Answer: D, E

by Avery at Jul 05, 2025, 06:06 AM

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Noelia

5 months ago

I thought they were just for padding frames, but I guess not!

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Ceola

5 months ago

Wait, are they really used for that? Sounds a bit off.

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Laura

5 months ago

Definitely! It's all about dynamic key creation.

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Melda

6 months ago

They help derive the Pairwise Transient Key, right?

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Arthur

6 months ago

Yeah, they’re crucial for avoiding unicast key sharing.

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Kaitlyn

6 months ago

I'm a bit confused about the role of nonces in the handshake. I thought they were just for integrity checks, but now I'm not so sure.

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Rosenda

6 months ago

I feel like I saw a question similar to this in practice exams, and it was about how they help in creating dynamic keys.

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Floyd

7 months ago

I remember something about them being used in the key derivation process, maybe for the Pairwise Transient Key? That sounds familiar.

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Beth

7 months ago

I think the ANonce and SNonce are definitely related to key generation, but I'm not sure if they directly create the GTK or something else.

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Dusti

7 months ago

The nonces are used to create dynamic keys and avoid sending encryption keys over the wireless medium. That's option E, which seems to be the best answer here.

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Tamekia

7 months ago

Hmm, I'm not entirely sure about this one. I know the nonces are important for security, but I'm not confident I can explain their exact purpose. I'll have to think this through carefully.

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Shenika

7 months ago

Okay, I've got this. The ANonce and SNonce are used as input values to derive the Pairwise Transient Key. That's option D, so I'll go with that.

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Raul

8 months ago

I'm a bit confused by the options here. I'll need to review my notes on the 4-way handshake to make sure I understand the role of the nonces.

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Nguyet

8 months ago

This question looks tricky, but I think I can figure it out. The key is to focus on the purpose of the ANonce and SNonce in the 4-way handshake.

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Ahmad

10 months ago

I'm just impressed they managed to work the word 'nonce' into a networking question. That's some next-level vocabulary right there.

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Tawny

10 months ago

I believe they are also used in the derivation of the Pairwise Transient Key.

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Celeste

10 months ago

Option C is just plain weird. Adding the nonces to get the GMK? What is this, amateur hour? I'm going with D and E, no doubt about it.

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Nenita

8 months ago

Definitely, D and E are the right answers. ANonce and SNonce play important roles in key derivation.

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Jolanda

8 months ago

Yeah, D and E seem like the correct choices for the purpose of ANonce and SNonce.

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Tatum

8 months ago

I agree, option C does sound strange. D and E make more sense.

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Elroy

10 months ago

I agree, they help in avoiding sending unicast encryption keys over the wireless medium.

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Antonio

11 months ago

I think the purpose of ANonce and SNonce is to create dynamic keys.

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Lashunda

11 months ago

Ah, the good old 4-way handshake! I bet the exam writer threw in some red herrings to trip us up. But I'm on to them - gotta love those nonces!

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Francene

11 months ago

D and E seem to be the right answers here. The nonces are used to derive the PTK, and they also help in creating dynamic keys without sending encryption keys over the wireless link.

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