Network Layer : The layer that responsible source to destination to delivery of packet
multiple network is called network layer.
Characteristics :
i) Logical addressing
ii) Routing
iii) Connecting different network.
1) Store and formed packet switching.
2) Service provided to the transport layer.
3) Implementation of connectionless service.
4) Implementation of connection-oriented source.
5) Comparison of virtual circuit and datagram submits.
i) Host transmits packet to router across LAN or oval point to point link.
ii) Packet is stored on router until fully arrived and processed.
iii) Packet is forward to next router.
2) Service provide to transport layer :
The network layer services have been designed with the goals : -
i) The advice should independent of router telenet
ii) The transport layer should be shilded from the number type and topology of the router present.
iii) The network addresses maid arailable to transport
Connectionless service used in network layer ID and transport layer.
Packet are frequently called datagram connectionless service is largly for data communication the internet.
Connection-oriented service is used a path from the source router to the destination router must be established before any data packet can be sent.
Connection oriented service also called virtual circuit service. This service used network layer for ATM. It also used in transport layer for TCP.
A connection must be established before any can be sent packets order preserved logical connection is also established here.
The network layer design issues :
1) Store and formed packet switching.
2) Service provided to the transport layer.
3) Implementation of connectionless service.
4) Implementation of connection-oriented source.
5) Comparison of virtual circuit and datagram submits.
1) Store and formed packet switching :
Store and forward operation : -i) Host transmits packet to router across LAN or oval point to point link.
ii) Packet is stored on router until fully arrived and processed.
iii) Packet is forward to next router.
i) The advice should independent of router telenet
ii) The transport layer should be shilded from the number type and topology of the router present.
iii) The network addresses maid arailable to transport
3) Implementation of connectionless service :
Connectionless service is offered packets are injected into the subnet individually and routed idependently of each other. Each packet is transmitted idenpendently.Connectionless service used in network layer ID and transport layer.
Packet are frequently called datagram connectionless service is largly for data communication the internet.
4) Implementation of connection-oriented service : -
Connection-oriented service is used a path from the source router to the destination router must be established before any data packet can be sent.
Connection oriented service also called virtual circuit service. This service used network layer for ATM. It also used in transport layer for TCP.
A connection must be established before any can be sent packets order preserved logical connection is also established here.
It is copied from Standard book Tanumbaum.
ReplyDeletePlease explain in simple meanings.
pls give some relavent and easy way type of answers
ReplyDeleteso many spelling mistakes.....
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