Question

What's the fewest number of minutes it can take for a 256Mb/s (Mega bits per second) connection to wrap- around (start reusing sequence numbers)? The number of possible combinations of sequence numbers is limited by 32 bits. For an example see the class presentation slides (corrected for the related example). Answer to the nearest tenth of a minute (need to convert from seconds). Provide your answer as a number with one decimal and do not provide a label for the units, BLANK-1

Answer 1

Possible combinations of sequence numbers is limited by 32 bits. So total Size is given as 2³² bytes = 4 GB = 4*8 =32 Gb (Giga bits)

Wrap-around time = (2³² *8 bits) / 256 Mbps = 4*8 Gb / 256 Mbps = 32*1024 Mb / 256 Mbps = 128 seconds = 2.1 minutes