Calculate final RTO if initial RTO is 6s; Seg 1 sent at 0s, Seg 2 sent at 2s, ACKs for Seg 1 and Seg 2 are received at 5s, Seg3 sent at 8s, Seg 4 sent at 9s, ACKs for Seg3 & Seg4 lost, Seg3 and Seg4 retransmitted after timeout, Seg5 sent at 50s, ACK for Seg3 and Seg4 received at 60s, ACK for Seg5 received at 65s.

(b) Two IP datagram carrying 10000 bytes of data each must be sent over a links as follows: S--A—B—C—D, where S is a source and D is a destination. Link AB has an MTU of 4468 bytes and link BC has an MTU of 800 bytes. Assume the datagram has IHL = 7; Identification numbers 218 and 219 respectively. How many fragments in total will be generated? Construct a table and answer values of the following fields for each of the fragments for AB and BC links: Identification, Total Length, D-bit, M-bit, and Fragmentation Offset.