Question: Question 1 a. Increasing the router memory to infinite cannot control the congestion. Agree or disagree? Elaborate briefly (60-100 words) b. Compare the following: Flow

Question 1

a. Increasing the router memory to infinite cannot control the congestion. Agree or disagree? Elaborate briefly (60-100 words)

b. Compare the following:

Flow Control vs Congestion Control

Open loop congestion control methods vs Closed Loop congestion control

Leaky Bucket Algorithm vs Token Bucket Algorithm

Warning Bit Method vs Random Early Detection Method

c. What do you mean by Load Shedding in congestion control?

d. Transport protocols resemble those you studied in Data Link Layer since both will have to deal with error control, sequencing, flow control etc. Still the two differ significantly. How? elaborate with at least 4 differences.

e. What is a 3 way hand shake? Is it better than 2 way hand shake?

f. When do we use Upward Multiplexing and Downward Multiplexing?

g. Suppose we design a reliable transport protocol that use only NAKs as feedback from receiver to sender:

If the data rate is low (sender sends packets infrequently),is a NAK-only protocol better than a ACK-based protocol? Why?

if the data rate is high and the network drops only a small number of packets is a NAK-only protocol better than a ACK-based protocol? Why?

g. What are the 3 transport layer servcies?

h. Compare the design issues of Transport Layer with those of Network Layer

i. What is fragmentation? Why is fragmentation important in Transport Layer?

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