Which TCP/IP model layer is responsible for the delivery of packets?

The Internet Layer of the TCP/IP model is responsible for the delivery of packets across the network. This layer manages the routing of packets through different interconnected networks, ensuring that data reaches its destination efficiently. The primary protocol at this layer is the Internet Protocol (IP), which handles addressing and encapsulating packets, allowing them to traverse multiple networks.

The Internet Layer operates independently of the underlying hardware, meaning it does not concern itself with how the data is physically sent or received, which is managed by the Link Layer. It utilizes the logical addressing provided by IP to determine the best path for packet delivery. This involves routing, which is crucial for navigating the complex paths data must take over the internet or other networked environments.

The other layers serve different functions: the Application Layer deals with the end-user interface and services; the Transport Layer is responsible for end-to-end communication and error recovery but typically ensures the delivery of messages rather than packets. The Link Layer involves the physical transmission of data over network technologies, managing how bits are transmitted over various media. Understanding these distinctions helps clarify why the Internet Layer is specifically focused on packet delivery.