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SIT202: Introduction to Network Layer - Network Layer Services - IT Assessment Answer
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TASK:
Question-1 SIT202
1) In current classful addressing, there are 5 classes as shown in Fig. 18.18 (p. 531 of the textbook). There are 5 classes with variable-length leading bits as follows:
Class A: 0; Class B: 10; Class C: 110; Class D: 1110; Class E: 1111
Suppose that we wish to modify to accommodate 9 classes. What are 9 (variable-length) leading bits for them?
2) A classless address is given
? Find the first and last addresses in the block (explain in detail how you can find them).
? Find the mask.
Question-2: SIT202
Consider the network consisting of 5 nodes.
1) Find the distance vectors for all the nodes.
2) Can the maximum distance of the network (the maximum distance between any pair of different nodes, i.e., {A,C}, {A,D}, {B,C}, etc) be lowered if the distance between
nodes B and E becomes 2? Please explain how you come to the answer (Yes or No).
3) Find the maximum distance of the network if the link between nodes A and C is removed. In addition, discuss what is the performance loss after losing the link between nodes A and C. SIT202
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