GAQM CPEH-001 Exam - Topic 1 Question 111 Discussion

Actual exam question for GAQM's CPEH-001 exam

Question #: 111
Topic #: 1

Sandra is conducting a penetration test for XYZ.com. She knows that XYZ.com is using wireless networking for some of the offices in the building right down the street. Through social engineering she discovers that they are using 802.11g. Sandra knows that 802.11g uses the same 2.4GHz frequency range as 802.11b. Using NetStumbler and her 802.11b wireless NIC, Sandra drives over to the building to map the wireless networks. However, even though she repositions herself around the building several times, Sandra is not able to detect a single AP. What do you think is the reason behind this?

ANetstumbler does not work against 802.11g.

BYou can only pick up 802.11g signals with 802.11a wireless cards.

CThe access points probably have WEP enabled so they cannot be detected.

DThe access points probably have disabled broadcasting of the SSID so they cannot be detected.

E802.11g uses OFDM while 802.11b uses DSSS so despite the same frequency and 802.11b card cannot see an 802.11g signal.

FSandra must be doing something wrong, as there is no reason for her to not see the signals.

Show Suggested Answer

Suggested Answer: A

by Maddie at Apr 30, 2025, 08:40 PM

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Melissa

5 months ago

Totally, Sandra might just need a better setup!

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Earlean

5 months ago

Wait, can 802.11b even detect 802.11g? Sounds off.

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Mitsue

5 months ago

Nah, WEP doesn't hide networks from detection.

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Sharee

6 months ago

802.11g and 802.11b do use the same frequency.

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Javier

6 months ago

I think the SSID broadcasting could be off.

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Albina

6 months ago

I recall a practice question about WEP encryption affecting visibility. If they have WEP enabled, could that be a reason she can't detect the APs?

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Denise

6 months ago

I’m a bit confused about the compatibility between 802.11b and 802.11g. I thought they could work together, but maybe there’s something I missed in the details?

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Brock

7 months ago

I think it might be related to the SSID broadcasting. If they disabled it, that could explain why she can't find the APs.

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Dortha

7 months ago

I remember studying that 802.11g should be detectable by 802.11b cards since they operate on the same frequency. So, I’m not sure why she can’t see anything.

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Carmela

7 months ago

I'm pretty confident the answer is E. The different modulation techniques between 802.11b and 802.11g mean the 802.11b card just can't see the 802.11g signals, even though they're on the same frequency. That's a key difference between the two standards that's important to understand.

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Pamela

7 months ago

I'm a bit confused here. If the APs are using 802.11g, why would Sandra be using an 802.11b card? Seems like she should have the right hardware to detect them. Maybe she's doing something wrong with the scanning tool? I'll have to review the 802.11 standards again.

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Latonia

7 months ago

E seems like the most likely answer to me. 802.11g uses OFDM modulation, while 802.11b uses DSSS. So even though they're on the same frequency, the 802.11b card might not be able to pick up the 802.11g signals.

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Tambra

8 months ago

Hmm, I'm not sure about this one. The question mentions that the APs are using 802.11g, but Sandra is using an 802.11b card. Could that be the issue? I'll have to think about the differences between the two standards.

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Chanel

8 months ago

I think the answer is probably D - the access points have disabled SSID broadcasting, so NetStumbler can't detect them. That's a pretty common security measure.

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Ryan

12 months ago

I think Sandra might be doing something wrong, there's no reason for her to not see the signals.

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Alison

1 year ago

I disagree, I believe the issue is that 802.11g uses OFDM while 802.11b uses DSSS so her 802.11b card cannot see an 802.11g signal.

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Ethan

1 year ago

Wow, Sandra's really struggling with this one. Maybe she should have taken a 'Wireless Hacking 101' course before jumping into the real thing. That 802.11b card is about as useful as a paperweight here.

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Hoa

11 months ago

F) Sandra must be doing something wrong, as there is no reason for her to not see the signals.

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Roslyn

11 months ago

E) 802.11g uses OFDM while 802.11b uses DSSS so despite the same frequency and 802.11b card cannot see an 802.11g signal.

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Blythe

11 months ago

D) The access points probably have disabled broadcasting of the SSID so they cannot be detected.

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Felix

11 months ago

A) Netstumbler does not work against 802.11g.

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Hollis

1 year ago

I think the reason Sandra can't detect any AP is because the access points probably have disabled broadcasting of the SSID.

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Robt

1 year ago

D seems like the most likely answer. They probably have SSID broadcasting disabled to keep the network more secure. Sandra needs to try some more advanced techniques to find those hidden APs.

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Annett

12 months ago

F) Sandra must be doing something wrong, as there is no reason for her to not see the signals.

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Erinn

12 months ago

D) The access points probably have disabled broadcasting of the SSID so they cannot be detected.

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Aleta

1 year ago

A) Netstumbler does not work against 802.11g.

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Rima

1 year ago

Haha, Netstumbler not working against 802.11g? Come on, that's so 2005! Any decent wireless hacking tool should be able to handle that these days.

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Francisca

1 year ago

I think option E is the correct answer. 802.11g uses OFDM while 802.11b uses DSSS, so even though they use the same frequency, the 802.11b card can't detect the 802.11g signal.

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