TCP-IP Model Layers of TCP-IP Reference Model Application Transport Network/Internet Protocol Host to network Host to network Interface Layer: This layer defines the protocols & hardware request to deliver data across physical network. The term network interface layer refers to the fact that it defines how to connect the host computer which is not a part of the network, to the network. Ethernet is one example protocol at TCP/IP network layer. TCP/IP reference model does not really says much about what happens where, expect to point out that the host has to connect to the network using protocols so it can send up packets over it. Network/Internet Layer: This layer defines an official packet format and protocols called Internet Protocol(IP). The job of this layer is to deliver IP packets where they are supposed to go. Packet routing is clearly the major issue at this layer and avoiding congestion. ...
