Which layer of the TCP/IP model is equivalent to the OSI Internet layer?

The Network layer of the TCP/IP model corresponds directly to the Internet layer in the OSI model. In network communication, the primary responsibility of the Network layer is to determine how data is sent to the receiving device across multiple networks. This includes routing, addressing, and managing traffic to ensure that data packets are delivered efficiently.

In contrast, the Transport layer is responsible for ensuring that data is transferred reliably and in the correct sequence, which includes protocols like TCP and UDP. The Application layer is focused on providing network services to end-user applications, such as HTTP or FTP. The Session layer, which manages sessions or connections between applications, is not present in the TCP/IP model in the same way as OSI.

By understanding the role of the Network layer in the context of the TCP/IP model, it becomes clear how it aligns with the functions of the Internet layer in the OSI model, establishing it as the correct answer.