April 2000
AN215 : ADVANCED NETWORKING

QUESTION 4

Total Marks: 15 Marks

• Question 1
• Question 2
• Question 3
• Question 5
• Cover Page

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SUGGESTED SOLUTIONS
for Question 4

((a)Explain the term modulation.Briefly explain,with the aid of a diagram,one
modulation technique.[3 marks ]

(b)Name and explain briefly describe any four data communications services provided by a typical telecommunications service providers.[8 marks ]

(c)Video on Demand is a service where customers can select a film from an on-line catalogue and it will be transmitted directly to their TV sets.
A 2-hour digitized movie occupies 3GB of storage.What is the minimum data-rate that the network must achieve?What sort of medium would make a suitable economical choice?[4 marks ]