The network layer is responsible for the source to destination delivery of a packet possibly across multiple networks. It also determines the delivery of packet from origin to destination in a network.
If two systems connected to same network then network layer is not needed. But for different network from source to destination delivery it is needed.
Some responsibilties of network layer are below:
If two systems connected to same network then network layer is not needed. But for different network from source to destination delivery it is needed.
Some responsibilties of network layer are below:
- For different networks the network layer adds a header to the packet coming from upper layer including logical address of sender and receiver.
- When the independent networks are connected together to create an internetwork, the connecting devices ( routers and gateways ) route the packets to their destination.
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