While opening a TCP connection, the initial sequence number is to be ...
The maximum packet lifetime is given to be 64 seconds in the question.
Thus, a sequence number increments after every 64 seconds.
So, minimum permissible rate = 1 / 64 = 0.015 per second.
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While opening a TCP connection, the initial sequence number is to be ...
Calculating the Minimum Permissible Rate:
To calculate the minimum permissible rate at which sequence numbers used for packets of a connection can increase, we need to consider the maximum packet lifetime and the increment of the clock counter.
Given Information:
- Clock counter increments once per millisecond
- Maximum packet lifetime = 64 seconds
Calculation:
- The maximum sequence number that can be represented using 32 bits is 2^32 - 1
- The clock counter increments once per millisecond, so in 64 seconds, it will increment by 64,000 times
- The minimum permissible rate at which sequence numbers can increase is calculated by dividing the maximum sequence number by the maximum packet lifetime in milliseconds:
= (2^32 - 1) / 64,000
= 4,294,967,295 / 64,000
≈ 67,108.42
Converting to Seconds:
To convert this rate to seconds, we divide by 1,000 (since the clock counter increments once per millisecond):
≈ 67,108.42 / 1,000
≈ 0.067/s
Conclusion:
The closest option to the calculated minimum permissible rate is option 'A' with a rate of 0.015/s.