Within the four-layer TCP/IP model, which layer is primarily responsible for selecting logical paths and forwarding packets between independent networks?
Network Access (Link) layer
Transport layer
Application layer
Internet layer
The Internet layer of the TCP/IP model performs functions equivalent to the Network layer in the OSI model. It assigns logical IP addresses to hosts, determines optimal routing paths, and forwards packets across multiple interconnected networks. The Application layer handles userālevel protocols, the Transport layer manages end-to-end communication (for example, TCP or UDP), and the Network Access or Link layer deals with physical addressing and media access. Therefore, only the Internet layer fulfills the routing role described.
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