Consider sending a 1500-byte TCP datagram into a link that has an MTU of 500 bytes. IPv4 Ident# 225

Consider sending a 1500-byte TCP datagram into a link that has an MTU of 500 bytes. Suppose that the original datagram is stamped with the identification number 225 of IP header. Assume that IPv4 is used, but not ICMP. (Hint: The IPv4 header is 20 bytes long)

a. Discuss where do the fragmentation of the datagram and also the fragments reassembly take place in the link’s components i.e. network?

b. Workout the number of fragments that are generated for this transmission. Show how you worked out using one general block diagram.

c. In addition to the identification number, what other fields are encapsulated into the generated IP datagram(s) in relation to fragmentation? List and discuss their purpose.

d. Using the answers given to the questions a, b, and c show the process of fragmentation in sending the 1500-byte datagram down the link. Use diagrams to show the steps.


ayesha12
Asked Nov 08, 2015

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