Systems Security Certified Practitioner – SSCP – Question1009 - Systems Security Certified Practitioner

Which layer of the TCP/IP protocol stack corresponds to the ISO/OSI Network layer (layer 3)?

A. Host-to-host layer
B. Internet layer
C. Network access layer
D. Session layer

Correct Answer: B

Explanation:

The Internet layer in the TCP/IP protocol stack corresponds to the network layer (layer 3) in the OSI/ISO model. The host-to-host layer corresponds to the transport layer (layer 4) in the OSI/ISO model. The Network access layer corresponds to the data link and physical layers (layers 2 and 1) in the OSI/ISO model. The session layer is not defined in the TCP/IP protocol stack.
Source: WALLHOFF, John, CBK#2 Telecommunications and Network Security (CISSP Study Guide), April 2002 (page 1).