CompTIA Network+ (N10-008) — Question 382

Which of the following layers is where TCP/IP port numbers identify which network application is receiving the packet and where it is applied?

Answer options

• A. 3
• B. 4
• C. 5
• D. 6
• E. 7

Correct answer: B

Explanation

The correct answer is B, as TCP/IP port numbers are utilized at the Transport layer (Layer 4) to identify specific applications on a device. The other layers do not handle port numbers; Layer 3 is for network routing, Layer 5 is for session management, Layer 6 deals with presentation formatting, and Layer 7 is the application layer but does not manage port assignments.