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Consider a token bucket with maximum rate *R = *20*(10^6)* bps*

* *suppose we want to make sure that the maximum rate can only be sent for at-most 10* seconds *at a time , and at- most ( maximum ) *150 Mb *can be sent over any 15 second window.

Then the required value for which the new tokens are added at the rate of r Mbps which we have to calculate in this question .

Capacity of the token bucket (b) = 150 Mbps

Maximum possible transmission rate (M) = 20*(10^{6})* bps*

So the maximum burst time = b/(M-r) = 10

Duration = b/M-r, where b is the initial capacity, M is outgoing rate and r is incoming rate

now put b= 150 Mbps, M = 20 Mbps , ^{ }we^{ }need to find r

b= (M-r) 10

b = 10M - 10r

10r = (200 - 150 )

r = 50 /10

r = 5

The value for token input rate is 5 Mbps

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