Important question

CS6551 Important questions Computer Networks Regulation 2013 Anna University

CS6551 Important questions Computer Networks

CS6551 Important questions Computer Networks Regulation 2013 Anna University free download. Computer Networks Important questions free pdf download.

Sample CS6551 Important questions:

1.What are the three criteria necessary for an effective and efficient network?

The most important criteria are performance, reliability and security. Performance of the network depends on number of users, type of transmission medium,the capabilities of the connected h/w and the efficiency of the s/w.Reliability is measured by frequency of failure, the time it takes a link to recover from the failure and the network’s robustness in a catastrophe.Security issues include protecting data from unauthorized access and viruses.

2.Group the OSI layers by function.

The seven layers of the OSI model belonging to three support layers: Consisting of Physical, data link and network layers and theydeal with the physical aspects of moving data from one device to another.User support layers: Consists of Session, presentation and application layers and they allow interoperability among unrelated software systems.The transport layer ensures end-to-end reliable data transmission

3. What are the features provided by layering?

It decomposes the problem of building a network into more manageable components.

Rather than implementing a monolithic piece of software that does everything implement several
layers, each of which solves one part of theproblem.

It provides more modular design. To add some new service, it is enough to modify the functionality at one layer, reusing the functions provided at all the other layers.

4. What are the two interfaces provided by protocols?

Service interface
Peer interface
Service interface-defines the operations that local objects can perform on the protocol.
Peer interface-defines the form and meaning of messages exchanged between protocol peers to implement the communication service.


Subject Name Computer Networks
Subject code CS6551
Regulation 2013

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