GIAC GPEN Exam - Topic 8 Question 88 Discussion

Actual exam question for GIAC's GPEN exam

Question #: 88
Topic #: 8

[All GPEN Questions]

Which of the following ports must you filter to check null sessions on your network?

A139 and 445

B111 and 222

C1234 and 300

D130 and 200

Show Suggested Answer

Suggested Answer: A

by Clorinda at Jun 19, 2026, 07:26 AM

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Paola

3 days ago

I feel like A is the best answer too. Those ports are crucial for security checks.

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Ronny

8 days ago

Agreed! A is definitely the right choice. It's all about SMB.

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Cecilia

13 days ago

I think it's A) 139 and 445. Those are common for null sessions.

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Robt

19 days ago

B and C don't even make sense for this.

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Sage

24 days ago

Yup, definitely A. It's all about SMB traffic!

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Weldon

29 days ago

Wait, are you sure about that? I thought it was different ports.

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Melodie

1 month ago

Totally agree, those are the common ones for null sessions.

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Aja

1 month ago

A) 139 and 445 are the ones to watch.

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Lamonica

1 month ago

I can't remember the exact ports, but I feel like null sessions were mentioned in relation to SMB. That might be 139 and 445 too.

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Lynna

2 months ago

I definitely recall that 139 and 445 are important for Windows networking, so I’m leaning towards option A.

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Valene

2 months ago

I'm not entirely sure, but I feel like we practiced something similar with filtering ports for security. Was it 111 and 222?

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Paris

2 months ago

I think I remember that ports 139 and 445 are related to file sharing and could be involved in null sessions.

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