Sixteen stations, numbered 1 through 16, are contending for the use of a shared channel by using the adaptive tree walk protocol. If all the stations whose addresses are prime numbers suddenly become ready at once, how many bit slots are needed to resolve the contention

11 bit slot will be needed

Explanation:

The number of prime numbers between 1 through 16

= 2, 3 , 5, 7, 11 and 13

hence we can say 6 stations are to use the shared channel

Given that all the stations are ready simultaneously

The number of bit slots that will be needed to handle the contention will be 11 bits :

slot 1 : 2, 3, 5 , 7, 11 , 13

slot 2 : 2,3, 5, 7

slot 3 : 2, 3

slot 4 : 2 .   slot 5 : 3 .  slot 6 : 5,7.   slot 7 : 5 .   slot 8 : 7.  slot 9: 11,13.  

slot 10 : 11.   slot 11 : 13

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