Which of the following are layers in the TCP/IP model?

The TCP/IP model is structured into layers that delineate the various functions and protocols used for network communication. The correct answer identifies three primary layers: Application, Transport, and Internet.

1. Application Layer: This is the topmost layer where user applications interact with the network. Protocols like HTTP, FTP, and SMTP operate at this layer, enabling users to perform tasks such as browsing the web or sending emails.

2. Transport Layer: This layer is responsible for establishing a connection and ensuring the reliable transfer of data between two endpoints. Protocols such as TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) function here, managing flows, error checking, and data segmentation.

3. Internet Layer: Also referred to as the Network Layer in other models, it is tasked with the movement of packets across the network. The Internet Protocol (IP) is the most significant protocol in this layer, determining how data is sent from the source to the destination across interconnected networks.

Each of these layers plays a crucial role in facilitating the communication process in networking. Options that include layers not defined as part of the TCP/IP model, such as Session, Physical, or Data Link, highlight their alignment with other networking models,