At which of the OSI/ISO model layer is IP implemented?

A.
Session layer

B.
Transport layer

C.
Network layer

D.
Data link layer

Explanation:
The Internet Protocol (IP) is implemented at the Network layer.
Incorrect Answers:
A: The session layer implements protocols such as NFS and NetBIOS, but not the IP protocol.
B: The transport layer implements protocols such as TCP and UDP, but not the IP protocol.
D: The Data link layer implements protocols such as ARP and ATM, but not the IP protocol.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 531