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Authors:
James F. Kurose, Keith W. Ross
Chapter:
The Network Layer
Exercise:
Problems
Question:1 | ISBN:9780132856201 | Edition: 6

Question

In this question, we consider some of the pros and cons of virtual-circuit and datagram networks.

a. Suppose that routers were subjected to conditions that might cause them to fail fairly often. Would this argue in favor of a VC or datagram architecture? Why?

b. Suppose that a source node and a destination require that a fixed amount of capacity always be available at all routers on the path between the source and destination node, for the exclusive use of traffic flowing between this source and destination node. Would this argue in favor of a VC or datagram architecture? Why?

c. Suppose that the links and routers in the network never fail and that rout- ing paths used between all source/destination pairs remains constant. In this scenario, does a VC or datagram architecture have more control traffic overhead? Why?

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Answer

a)

Assume that routers were subjected to conditions that might cause them to fail fairly often. 

I Prefer the data gram architecture. The reasons are:

  • VC means virtual circuit network. It is a connnection oriented network through router. If network problems occured by the router failed.
  • Data gram architecture is a connection less network. It can handle between the nodes in a network in hectic circumstances.

b) 

Assume that a source node and a destination require that a fixed amount of capacity always be available at all routers on the path between the source and destination node, for the exclusive use of traffic flowing between this source and destination node.

In this time, i prefer VC. The reason is that the VC router handles the path between source and destination nodes through a link. It is not possible in data gram architecture.

 

c)

Assume that the links and routers in the network never fail and that rout- ing paths used between all source/destination pairs remains constant. In this case  VC more control traffic overhead in datagram architecture. The reason is that VC is connection -oriented network and not possible to change the network till the transmission of all the packets is completed. 

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Dr siraj rathore said that: Betw Lun Phuy Chaur.

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