Which layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model?

The correct answer identifies the Host-to-Host layer in the TCP/IP stack as equivalent to the Transport layer of the OSI model. In the OSI model, the Transport layer is responsible for providing end-to-end communication services for applications. It ensures data integrity, flow control, and error recovery.

In the TCP/IP stack, the Host-to-Host layer serves a similar purpose by facilitating communication between hosts and managing the flow of data between them. It includes protocols like TCP (Transmission Control Protocol) and UDP (User Datagram Protocol), which are critical for establishing connections, ensuring reliable transmission, or providing lightweight communication depending on the needs of the applications.

Understanding the key functions of these layers within their respective models highlights the role of the Host-to-Host layer in enabling effective communication over the network. This knowledge is essential for network management and troubleshooting, helping to ensure a seamless exchange of information between devices.