GIAC Exam GSNA Topic 1 Question 73 Discussion

Actual exam question for GIAC's GSNA exam

Question #: 73
Topic #: 1

[All GSNA Questions]

What does a firewall check to prevent certain ports and applications from getting the packets into an Enterprise?

AThe network layer headers and the session layer port numbers

BThe transport layer port numbers and the application layer headers

CThe application layer port numbers and the transport layer headers

DThe presentation layer headers and the session layer port numbers

Show Suggested Answer

Suggested Answer: B

A firewall stops delivery of packets that are not marked safe by the Network Administrator. It checks the transport layer port numbers and the

application layer headers to prevent certain ports and applications from getting the packets into an Enterprise.

Answer C, A, and D are incorrect. These information are not checked by a firewall.

by Frederick at Jul 14, 2025, 06:55 AM

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Alana

4 days ago

Option B seems to be the right answer here. The firewall checks the transport layer port numbers and the application layer headers to prevent certain ports and applications from getting the packets into the enterprise.

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