Question: answer fully please Q 3(d) Consider an institutional network accessing the internet via a 1Mbps link. Suppose there are an average of 25 requests per

answer fully please

Q 3(d) Consider an institutional network accessing the internet via a 1Mbps link. Suppose there are an average of 25 requests per second with the average size of the object returned being 40,000 bits. Suppose a local proxy server is installed with a 40% hit rate. i) Describe the processing of HTTP queries from institutional users, including the use of conditional GET. ( 4 marks) ii) What is the link utilisation prior to the cache being installed? ( 3 marks) iii) What is the link utilisation after the cache is installed? (2 marks) iv) Comment on the contribution to delay of the access link with and without the use of the cache. Assume that the round trip time delay dominates the transmission and local access delays. (4 marks)

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