Delays. A user in Madagascar, connected to the internet via a 100 Mb/s (b=bits) connection retrieves a 250 KB (B=bytes) web page from a server in Tokyo, where the page references three images of 500 KB each. Assume that the one-way propagation delay is 82 ms and that the user’s access link is the bandwidth bottleneck for this connection. a.) Approximately how long does it take for the page (including images) to appear on the user’s screen, assuming non-persistent HTTP using a single connection at a time? (For this part, you should ignore queueing delay and transmission delays at other links in the network) b.) Assume a cache rate of 45% on the information received by the user in Madagascar from the Tokyo server. How does this affect your answer in a? Show your work.

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Delays. A user in Madagascar, connected to the internet via a 100 Mb/s (b=bits) connection
retrieves a 250 KB (B=bytes) web page from a server in Tokyo, where the page references three
images of 500 KB each. Assume that the one-way propagation delay is 82 ms and that the user’s
access link is the bandwidth bottleneck for this connection.
a.) Approximately how long does it take for the page (including images) to appear on the user’s
screen, assuming non-persistent HTTP using a single connection at a time? (For this part, you
should ignore queueing delay and transmission delays at other links in the network)

b.) Assume a cache rate of 45% on the information received by the user in Madagascar from the
Tokyo server. How does this affect your answer in a? Show your work.

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