Consider an institutional network consisting of a 10 Mbps LAN with a 1 Mbps access link to the public Internet. Suppose the average size of a requested web object is 50,000 bits and the average request rate from the institution's browsers to remote servers is 200 objects per second. You may assume that internet delays are 4 seconds and LAN delays are negligible i) What is the utilisation on the access link? (2 marks) i) What delay will be experienced by users attempting to access web pages? (2 marks) Suppose an institutional Web Cache is installed i a. Describe the role of the HTTP conditional GET in Web Caching b. What hit rate would be required to reduce the access link utilisation to C. If the access link utilisation is reduced to 55%, what is the average time (4 marks) 55%? (2 marks) needed to access a web object