TCP/IP 5 Layer Network Model consists of Physical layer,Datalink layer,Network layer,Transport layer and Application layer.

The physical layer is a lot like what it sounds. It represents the physical devices that interconnect computers. While the physical layer is all about cabling, connectors, and sending signals, the data link layer is responsible for defining a common way of interpreting these signals, so network devices can communicate.

The third layer, the network layer is also sometimes called the Internet layer. It's this layer that allows different networks to communicate with each other through devices known as routers. While the network layer delivers data between two individual nodes, the transport layer sorts out which client and server programs are supposed to get that data.

The transport layer is known as TCP or Transmission Control Protocol. For now, it's important to know that the network layer, in our case IP, is responsible for getting data from one node to another. The transport layer, mostly TCP and UDP, is responsible for ensuring that data gets to the right applications running on those nodes.

The fifth layer is the application layer. There are lots of different protocols at this layer, and as you might have guessed from the name, they are application-specific. Protocols used to allow you to browse the web or send and receive email are some common ones.