Considering the following figure as a schematic view of some parts of a network. Also, assume that the datagram X of size 5,000 bytes has just arrived at router C with the destination IP of 116.24.123.324.

a. (20 points) Assuming that router C forwards X to router B and the following table summarizes the forwarding table of router B, at which link interface, X (or its fragments) is (are) forwarded by router B? Why?

Destination Address	Link Interface
116.23.8.0/21
116.24.96.0/19
116.24.64.0/18
otherwise

b. (30 points) Assuming that router C forwards X to router B and router B decides to forward the datagram toward router A, explain how X is is fragmented at router B before getting forwarded. Also, specify the length of each fragment assuming that IP header is 20 bytes long.

02: 116.2315.131 116.23.12.11 B.01 MTU = 5KB MTU 2KB 0: 116.23.14.151