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GIAC GPEN Exam - Topic 8 Question 88 Discussion

Which of the following ports must you filter to check null sessions on your network?
A) 139 and 445
B) 111 and 222
C) 1234 and 300
D) 130 and 200

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?

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Suggested Answer: A

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

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Lynna
2 days 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
7 days 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
12 days 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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