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Question 58 - CWAP-404 discussion

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You are analyzing a packet decode of a Probe Request and notice the SSID element has a length of zero. What do you conclude about the transmitting STA?

A.
The WLAN adaptor is configured in promiscuous mode
Answers
A.
The WLAN adaptor is configured in promiscuous mode
B.
The STA is operating in Ad-Hoc mode
Answers
B.
The STA is operating in Ad-Hoc mode
C.
The STA's WLAN adaptor is disabled
Answers
C.
The STA's WLAN adaptor is disabled
D.
The STA is discovering a list of available BSSs
Answers
D.
The STA is discovering a list of available BSSs
Suggested answer: D

Explanation:

The STA is discovering a list of available BSSs by sending a Probe Request with an empty SSID element. This is also known as a broadcast Probe Request, as it does not specify any particular SSID to probe for. Any AP that receives this Probe Request will respond with a Probe Response containing its own SSID and other information about its BSS. This way, the STA can learn about all the BSSs in its vicinity and choose which one to associate with .

Reference: CWAP-404 Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 191; CWAP-404 Certified Wireless Analysis Professional Study and Reference Guide, Chapter 6: MAC Sublayer Frame Exchanges, page 193.

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asked 16/09/2024
Fiertelmeister Tibor
33 questions
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