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which OSI/ISO layer is an encrypted authentication betw…

At which OSI/ISO layer is an encrypted authentication between a client software package and a firewall
performed?

PrepAway - Latest Free Exam Questions & Answers

A.
Network layer

B.
Session layer

C.
Transport layer

D.
Data link layer

Explanation:
Encrypted authentication is a firewall feature that allows users on an external network to authenticate
themselves to prove that they are authorized to access resources on the internal network. Encrypted
authentication is convenient because it happens at the transport layer between a client software and a firewall,
allowing all normal application software to run without hindrance.
Incorrect Answers:
A: The firewall encrypted authentication feature is performed at the transport layer, not the network layer.
B: The firewall encrypted authentication feature is performed at the transport layer, not the session layer.
D: The firewall encrypted authentication feature is performed at the transport layer, not the data link layer.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 1161


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