Question: Consider the following institutional network system. Suppose the average object size is 100k bits and the average rate from browsers to origin servers is 15

Consider the following institutional network system. Suppose the average object size is 100k bits and the average rate from browsers to origin servers is 15 requests/sec. (ignore the LAN delay in the following questions)

Assume that _access= 1.5 Mbps and the RTT on the Internet side of the access link is 2 sec.

a. Considering the queueing delay in the access router, the access delay could be calculated with the equation _access = (R_trans/1-traffic intensity) * R_trans represents the transmission delay at the access link. Without web cache, what is the total average response time?

b. Compare this result with the situation where access = 100 Mbps.

c. Suppose the local web cache satisfy 60% of the requests, the remaining 40% requests will be satisfied by the origin web servers. What is the total response time in this case?

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