| 26. |
In OSI model, which of the following layer provides error-free delivery of data? |
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| 27. |
Error detection at the data link level is achieved by? |
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| 28. |
The area of coverage of a satellite radio beam is known as |
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| 29. |
Which of the following data transmission media has the largest terrestrial range without the use of repeaters or other devices? |
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| 30. |
What is the minimum number of wires needed to send data over a serial communication link layer? |
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