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Some Mid-Term Thoughts

Some Mid-Term Thoughts. Wed Oct 21 In class 1 hour 15 minutes exam Should not take more than 45 minutes Allowed to bring in two cheat sheets Fit in as much as you can But not much point Syllabus Everything covered till, and inclusive, Oct 14 i.e., Bellman Ford’s algorithms in Routing.

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Some Mid-Term Thoughts

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  1. Some Mid-Term Thoughts

  2. Wed Oct 21 • In class • 1 hour 15 minutes exam • Should not take more than 45 minutes • Allowed to bring in two cheat sheets • Fit in as much as you can • But not much point • Syllabus • Everything covered till, and inclusive, Oct 14 • i.e., Bellman Ford’s algorithms in Routing

  3. About the exam format • Questions will not test whether you remember • You will not have to write long essays • Not be asked to write code • Will probably have • Multiple choice questions • True and false questions • Some problems to solve • Arguments about tradeoffs • Exact test format • Not yet decided

  4. Some Examples: • (T/F) TCP sends a new packet whenever it gets an ACK (not a DupACK) from the receiver. • (T/F) A TCP sender starts a timer once a packet has been transmitted. • (T/F) Bandwidth constraint does not necessarily imply timing constraints • Argue in favor or against: Stop and wait is never better than GBN • Calculate expected latency when a proxy is, and is not, used for caching webpages. • The network, and relevant data will be provided • Write 2 advantages and 2 disadvantages for recursive and non-recursive DNS • Design a finite state machine for Go-Back-N • Calculate RTO for a given network (relevant data will be given) • Fill out an incomplete figure on TCP’s actions in certain conditions • Prove that TCP flows are fair to each other, irrespective of who starts first • Model TCP delay for slow start

  5. Questions?

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