Question

Which of the following correctly describes the TCP/IP model?

• A. A 4-layer model: Application, Transport, Internet, Network Access
• B. A 7-layer model including Physical and Data Link layers
• C. A 5-layer model including Session and Presentation layers
• D. A 3-layer model: Application, Transport, Network

Hint:

Compare TCP/IP with the OSI model to clarify layer functions.

Answer 1

The Correct Option is A

The TCP/IP model has four layers:
1. Application: Handles high-level protocols (e.g., HTTP, FTP).
2. Transport: Manages end-to-end communication (e.g., TCP, UDP).
3. Internet: Handles routing and addressing (e.g., IP).
4. Network Access: Manages data transmission over hardware.
Option (1) is correct.
Option (2) describes the OSI model.
Option (3) incorrectly includes OSI layers.
Option (4) omits the Network Access layer.