April 2000
AN215 : ADVANCED NETWORKING

QUESTION 5

Total Marks: 15 Marks

• Question 1
• Question 2
• Question 3
• Question 4
• Cover Page

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SUGGESTED SOLUTIONS
for Question 5

(a)Explain the term multiplexing.[2 marks ]

(b)Explain the concept of Time Division multiplexing.What is meant by statistical time division multiplexing?What kind of device would serve this purpose?What is the drawback of using this technique?[6 marks ]

(c)What is meant by the term guard band Explain why guard bands are needed. [3 marks ]

(d)Ten 9600bps lines are to be multiplexed using TDM.Ignoring overhead bits,what is the total capacity required by synchronous TDM?
Assuming that we wish to limit average line utilization to 0.8,and assuming each line is busy 50%of the time,what is the capacity required by statistical TDM?[4 marks ]