Network Layer (Layer 3)

The Network layer of the OSI Model’s responsibility is to provide node to node communication over the network. The node to node communication happens with the help of two functions

·        Logical Addressing

·        Routing

The logical address is actually the address of the device. The network layer adds two address with the data, one is the sender logical address and second is the reviver logical address. With the help of the logical addresses the next function is happen.

Routing concept is to route the data towards the correct destination.

Some of the network layer protocols are as follow

   ·        IP

   ·        IPX