Computer Networking First-Step: Your First-step into the World of Computer Networking

by Wendell Odom

IP sits at the internetwork layer of TCP/IP. That layer is most closely related to the OSI network layer, or OSI Layer 3. So, using popular networking jargon today, IP would be a network layer protocol.

TCP is a Layer 4 protocol. IP is a Layer 3 protocol. LANs define both Layer 1 and Layer 2 protocols. WANs define both Layer 1 and Layer 2 protocols. TCP is a transport layer protocol.

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