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Express Learning: Data Communications and Computer Networks by ITL Education Solutions Limited

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10

Routing and Congestion Control

1. Explain the various design issues of the network layer.

Ans: The network layer provides an end-to-end communication between two hosts. There are mainly four design issues in the network layer, which are discussed as follows:

images   Network Layer Interface: The network layer can follow two methods, namely, virtual circuit (connection-oriented network service) and datagram (connectionless network service) for sending packets from node to node. In the virtual circuit method, first a logical connection is established between the two communicating users and then the quality of service to be used is decided. All ...

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