The Network layer is a concerned with getting a packets from the source all the way to destination
- The packets my require to make many hops at the intermediate routers well reaching th destination
- This is the lowest lyaer that deals with end to end transmission
- In order to achieve it's goals,the network later most know about the topology of the communication Network
- It most also take care to choose routes avoid overloading of same of the communication line while leaving other idle
The mian functions performed by the Network layer are as follow
- Routing
- congestion control
- Internetworking
Routing : Routing is a process of forwarding of a packet in a network so that it reaches it's intended destination
congestion control : is handled other by the source or destination policies adopted by open loop.
Congestion control is RestransmRetra policy : it is the police in which retransmission of the packets are taken care
If the files sent the packets lost or corrupted,the packet need to be retransmitted
Internetworking : internetworking is practice of interconnected multiple computer network,such that any pair of host in the connected network can exchange message irrespective of their hardware level network topology
