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Chapter 3 - 11th - Data Communications Multiple Questions and Answers.
| 56. | In Asynchronous transmission; mark state is represented by choose which one is correct? | ||
| A. | 2 | ||
| B. | 1 | ||
| C. | 0 | ||
| D. | 50 | ||
| 57. | Which one is not unguided media? | ||
| A. | Satellite | ||
| B. | Microwave | ||
| C. | Mobile communication | ||
| D. | Fiber optical cable | ||
| 58. | communication medium requires �line-of-sight� choose which one is correct? | ||
| A. | Microwave | ||
| B. | Fiber optic cable | ||
| C. | Twisted pair | ||
| D. | Coaxial cable | ||
| 60. | Satellites are approximately miles above the earth choose which one is correct? | ||
| A. | 300 miles | ||
| B. | 22,000 miles | ||
| C. | 23300 miles | ||
| D. | 22300 miles | ||
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