Computer Networks

1:

Let the clock-driven scheme for generating initial sequence numbers is used with a 15-bit wide clock counter. The clock ticks once every 100 msec, and the maximum poacket lifetime is 60 sec.
How often need resynchronization take place in the worst case ?

A.

2216.8 sec

B.

2816.8 sec

C.

3216.8 sec

D.

3416.8 sec

 

Answer : C

Explanation :

The clock takes 32768 ticks, i.e., 32768 sec to cycle around.
At zero generation rate, the sender would enter the forbidden zone at
                                  = 3276.8 - 60
                                  =  3216.8 sec. 

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Option: A

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