Question: QUESTION 4 TOTAL MARKS: 25) a 4(a) Describe a Circular Distributed Hash Table. Be sure to mention the basic principles of information storage, and how

QUESTION 4 TOTAL MARKS: 25) a 4(a) Describe a Circular Distributed

QUESTION 4 TOTAL MARKS: 25) a 4(a) Describe a Circular Distributed Hash Table. Be sure to mention the basic principles of information storage, and how information is accessed Q 4(b) [6 Marks] 6 Marks] Describe how the Session Initiation Protocol (SIP) may be used to support peer to peer communication. Q4(c) Consider a file distribution system with the following parameters. [13 Marks] Let F 15Gbits 10 1024Mbits be the size of a file to be distributed. Let N be the number of users wishing to get a copy of the file. us 150 Mbps is the upload rate of the server's access link. ui u 3 Mbps is the upload rate of user i's access link. di -15 Mbps is the download rate for user i i Assuming we can produce an optimal peer-to-peer distribution architecture, for what value of N is it five times as fast to use a peer-to- peer system than a client- server system? (8 marks) ii) What is the limiting value for the file distribution time as the number of users N continues to increase? (5 marks) End of Question4]

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