Network layer in ISO OSI Reference Model

Network layer in ISO OSI Reference Model

Functions of Network layer in ISO OSI Reference Model

                  Network layer is concerned with controlling the operations of the network.

                  Network Layer is responsible for the source to destination delivery of individual packets.

                  Network Layer provides functions for routing and multiplexing.

                  Network Layer is also responsible for congession control.

                  Network Layer receives data unit (segment) from transport layer and it adds the header information to the segment .

                 The header information   includes logical address ( ip address )     information.

                 The main protocol  in network layer is IP ( Internet Protocol ) .

                 Other protocols in network layer are IGMP , ICMP , ARP , RARP.

                 The device working in network  layer is router.

                 IP ( Internet Protocol ) is the carrier of data and it is a connectionless unreliable protocol.