Systems Security Certified Practitioner (SSCP) — Question 121

In the Open Systems Interconnect (OSI) Reference Model, at what level are TCP and UDP provided?

Answer options

• A. Transport
• B. Network
• C. Presentation
• D. Application

Correct answer: T, C, P, U, D, P, O, S, I

Explanation

The correct answer is A. Transport, as both TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) function at this layer, facilitating end-to-end communication and data flow control. The other options, Network, Presentation, and Application, do not handle the transport of data segments but are responsible for routing, data formatting, and user interface respectively.