Data Communication Q.29

0. A 100 km long cable runs at the T1 data rate. The propagation speed in the cable is half the speed of light. How many bits is in the cable ?

Answer
Comment
Array

Option : C
Explanation : Propagation speed in the cable = 200,000 km/sec = 200 km/psec. Hence 100 km cable will be filled in 500 psec. This corresponds to four 193-bit frames, or 772 bits on the cable.

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