2008 Fall Midterm 2 Solutions

2008 Fall Midterm 2 Solutions - I Quickies A If the...

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I. Quickies A. If the fragment flag is set to 1, then the host knows that more fragments are to follow. End hosts can distinguish between fragments from different packets by checking the packet ID number on all fragments, which is the same for the entire packet. B. In unicast you send a message to one receiver whose IP address is known. In multicast, you send a message to a group of hosts whose group address G is known, all receivers who are memers of group G receive the message. C. Using split-horizon, routes learned from a host are removed before sending the route advertisement. In poisoned-reverse, routes learned from a host are sent with cost = ∞. D. Local-PREF is used as the initial discriminator for path selection for packets going out of the network, this is used when the AS path lengths are the same and one path needs preference over the other. Local-PREF is used only within an AS. MED values are usually used as tie-breakers for incoming traffic onto an AS.
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This note was uploaded on 12/16/2010 for the course CS 352 taught by Professor Staff during the Spring '06 term at Rutgers.

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2008 Fall Midterm 2 Solutions - I Quickies A If the...

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