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 ?
| A. | 572 |
| B. | 672 |
| C. | 772 |
| D. | 873 |
Answer : 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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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
