Systems Security Certified Practitioner – SSCP – Question0919 - Systems Security Certified Practitioner

Which OSI/ISO layers are TCP and UDP implemented at?

A. Application layer
B. Presentation layer
C. Session layer
D. Transport layer

Correct Answer: D

Explanation:

TCP and UDP are implemented at the transport layer (layer 4). Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 3: Telecommunications and Network Security (page 82).