3213Assignment1_solutions

3213Assignment1_solutions - CSE 3213 Computer Networks...

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CSE 3213: Computer Networks Assignment # 1 - Solutions Winter 2008 Q.1 Solution: (a) Telephone Network – infrastructure and services: The telephone network has a strongly controlled structure - it must keep track and have control over all existing connections (subnetworks), and their underlying technologies, to be able to provide a high QoS connection-oriented service. Scaling this structure is costly and difficult The range of services provided by a telephone network is limited. New services cannot be easily introduced as it will involve changing the hardware at the local and trunk telephone centers. (a) Internet – infrastructure and services: In the case of the Internet, new networks (regardless of their underlying physical- and data-link- layer technology) can be connected to the global inter-network through routers. New services can be easily introduced in the Internet as long as these services are built on the existing TCP/UDP and IP protocols.
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