GIAC GPEN Exam - Topic 5 Question 90 Discussion

Actual exam question for GIAC's GPEN exam

Question #: 90
Topic #: 5

John works as a professional Ethical Hacker. He is assigned a project to test the security of www.we-are-secure.com. You have searched all open ports of the we-are-secure server. Now, you want to perform the next information-gathering step, i.e., passive OS fingerprinting. Which of the following tools can you use to accomplish the task?

ASuperscan

BNmap

CP0f

DNBTscan

Show Suggested Answer

Suggested Answer: C

by Asuncion at Jul 19, 2026, 01:43 AM

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Mariann

4 days ago

You can definitely use Nmap for OS fingerprinting.

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Jutta

9 days ago

I’m confused about NBTscan; I thought it was for NetBIOS information, not OS fingerprinting.

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Sarina

14 days ago

I think I saw a question similar to this in our last mock exam, and P0f was the answer there too.

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Joseph

19 days ago

I’m not entirely sure, but I feel like Superscan is more for port scanning rather than OS fingerprinting.

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Carissa

25 days ago

I remember practicing with Nmap for active scanning, but I think P0f is the right choice for passive OS fingerprinting.

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