IP Router & IP Forwarding Table

[Quincy]

Homework Statement

Consider an IP Router with four link interfaces numbered 0 to 3. Packets are to be forwarded according to the table:
http://img688.imageshack.us/img688/4844/iproutertable.jpg

Write down an IP forwarding table with ve entries that forwards packets to the correct interfaces. Use CIDR (Classless Interdomain Routing) notation for the network addresses.

The Attempt at a Solution

Interface 0: 11100000 00 -> 224.0.0.0/10

Interface 1: 11100000 01000000 -> 224.64.0.0/16


Interface 2: 11100001 0 -> 225.0.0.0/9 (Solution manual says it should be 1110000 -> 225.0.0.0/7 --- Why/How?)

 

[Quincy]

Anyone? really need help with this one...