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The TCP/IP Model

TCP/IP stands for Transmission Control Protocol / Internet Protocol.

The TCP/IP model consists of 4 layers and is the model that the Internet is based on.

Each layer of the model has a specific job to do in order for communication to take place over the network.

The four layers in order from top to bottom are: Application, Transport, Internet and Network Access (also known as link).

One common way of remembering the layers of the TCP/IP model and their order is by using a sentence that includes a mnemonic: TCP/IP comes in A TIN.

TCP/IP comes in a tin

Next: TCP/IP Model Visualised