Internet layer

Group of internetworking methods in the TCP/IP suite / From Wikipedia, the free encyclopedia

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The internet layer is a group of internetworking methods, protocols, and specifications in the Internet protocol suite that are used to transport network packets from the originating host across network boundaries; if necessary, to the destination host specified by an IP address. The internet layer derives its name from its function facilitating internetworking, which is the concept of connecting multiple networks with each other through gateways.

The internet layer does not include the protocols that fulfill the purpose of maintaining link states between the local nodes and that usually use protocols that are based on the framing of packets specific to the link types. Such protocols belong to the link layer. Internet-layer protocols use IP-based packets.

A common design aspect in the internet layer is the robustness principle: "Be liberal in what you accept, and conservative in what you send"[1] as a misbehaving host can deny Internet service to many other users.

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