hw6-sol - ECE 407: Introduction to Computer Communications...

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Homework #6 - Solutions Problem 4 Solution: a. Header value Output link H3 3 b. Since this is a datagram network and forwarding is done as a function of the destination address alone, you cannot have the different output interfaces differentiated by the source address. c. Router A Incoming interface Incoming VC Outgoing interface Outgoing VC 1 7 3 12 2 5 4 8 3 11 1 10 4 13 2 5 d. Router B Incoming interface Incoming VC Outgoing interface Outgoing VC 1 12 2 9 2 17 1 11 Router C Incoming interface Incoming VC Outgoing interface Outgoing VC 1 8 2 15 2 16 1 13 Router D Incoming interface Incoming VC Outgoing interface Outgoing VC 1 9 3 14 2 15 3 14 3 19 1 17 3 19 2 16 Problem 10 Solution: Prefix Match Interface Range of destination Number of addresses 00 0 00000000 through 00111111 2 6 010 1 01000000 through 01011111 2 5 011 2 01100000 through 01111111 2 5 10 2 10000000 through 10111111 2 6 11 3 11000000 through 11111111 2 6 Problem 12 Solution:
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hw6-sol - ECE 407: Introduction to Computer Communications...

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