Suppose a router has built up the routing table shown in Table Q5(a). The router can deliver packets directly over interfaces 0 and 1, or it can forward packets to routers R2, R3, or R4. Describe what the router does with a packet addressed to each of the following destinations Q5 (a) (i) 128.96.171.92 (ii) 128.96.167.151 (iii)128.96.163.151 (iv)128.96.169.192 (4 marks) SubnetNumber 128.96.170.0 128.96.168.0 12896.166.0 128.96.164.0 (default) SubnetMask 255.255.254.0 255.255.254.0 255.255.254.0 255.255.252.0 NextHop Interface 0 Interface 1 R2 R3 R4 Table Q5(a) Suppose a TCP segment with size 4500 bytes is passed to IP for delivery across two networks of the Internet. The first network (link) uses 30-byte headers and has an MTU (Maximum Transfer Unit) size of 1500 bytes; the second network uses 10-byte headers with an MTU of 800 bytes. Each network's MTU gives the size of the largest IP datagram that can be carried in a link layer frame (b) Give the sizes (total length of the packet) and offsets of the sequence of fragments delivered to the network layer at the output of the two networks. Assume all IP headers are 20 bytes (7 marks)