Which of the following is NOT a layer of the Internet Protocol Suite (TCP/IP)?

Correct option is B

The Internet Protocol Suite (TCP/IP) consists of four layers, each responsible for specific aspects of communication:

1. Application Layer: This layer interacts with software applications and provides services like HTTP, FTP, and DNS.
2. Transport Layer: This layer ensures reliable communication between two hosts and handles protocols like TCP and UDP.
3. Network Layer: This layer is responsible for routing data across networks and uses protocols like IP (Internet Protocol) for addressing and packet forwarding.
4. Link Layer: Often considered the Data Link Layer in the OSI model, it handles the physical and logical connection between devices on the same network.

Additional Information:

• The Physical Layer is part of the OSI model, not the TCP/IP model. It deals with the actual hardware transmission of data over physical media like cables or wireless signals.
• In the TCP/IP model, the link layer encompasses both the data link and physical layers, thus making the Physical layer not a part of the TCP/IP model directly.