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Computer Networking : A Top-Down Approach

Computer Networking : A Top-down Approach

Authors: James F. Kurose, Keith W. Ross
ISBN: 9780132856201
Edition: 6
Chapter: Transport Layer
Exercise: Problems
Question: 56

 

Question

In this problem, we consider the delay introduced by the TCP slow-start phase. Consider a client and a Web server directly connected by one link of rate R. Suppose the client wants to retrieve an object whose size is exactly equal to 15 S, where S is the maximum segment size (MSS). Denote the round-trip time between client and server as RTT (assumed to be constant).

Ignoring protocol headers, determine the time to retrieve the object (including TCP connection establishment) when

a. 4 S/R > S/R + RTT > 2S/R

b. S/R + RTT > 4 S/R

c. S/R > RTT.

Answer

Consider the following data:

 

The transmission rate of Client and Web = R.

Maximum Segment Size (MSS) = S

Round Trip Time (RTT) between client and server is constant.

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