(Solved): Shown below is the partial format sketch for 4 IP datagram fragments that have arrived at a host. Sh ...

Shown below is the partial format sketch for 4 IP datagram fragments that have arrived at a host. Shown for each datagram are four fields from the IP datagram headers and the number and values of bytes of application-level data contained in each datagram. Assume all four IP datagrams have the same source and destination IP addresses, all have the same source and destination port addresses, and all indicate TCP as the transport protocol (the application is running on top of a TCP socket).

a) Sketch (using a similar format) the final IP datagram that will result from reassembling these datagrams. Be sure to indicate the position and length of IP and TCP headers and the position, length, and values of all the application data bytes. Assume that IP and TCP headers have no options fields present. b) Suppose the IP datagram with fragment \( =0 \) in the datagram header had been lost by the network but the remaining three with fragment \( =1 \) had arrived safely. How would the datagram reassembly be handled in this case?