Question 21 : Spread spectrum signals are used for
1. Ranging
2. Determination of position
3. Ranging & Determination of position
4. None of the mentioned
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Question 22 : Jamming is caused by
1. Multipath
2. Natural phenomena
3. Multipath & Natural phenomena
4. None of the mentioned
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Question 23 : The minimum packet size of Ethernet is
1. 81 bytes
2. 75 bytes
3. 72 bytes
4. 64 bytes
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Question 24 : CDMA rejects
1. Narrow band interference
2. Wide band interference
3. Narrow & Wide band interference
4. None of the mentioned
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Question 25 : Which method is better suited for large population?
1. Straight polling
2. Binary tree search
3. Straight polling & Binary tree search
4. None of the mentioned
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Question 26 : As channel capacity increases, channel throughput
1. Increases
2. Decreases
3. Remains the same
4. None of the mentioned
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Question 27 : Some advantages of spread spectrum are
1. Low susceptibility
2. Immunity to jamming
3. Reduced interference
4. All of the mentioned
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Question 28 : Which is more suitable when large number of transmitters are used?
1. Synchronous CDMA
2. Asynchronous CDMA
3. Synchronous & Asynchronous CDMA
4. None of the mentioned
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Question 29 : Which provides constant delay?
1. Synchronous TDM
2. Non synchronous TDM
3. Synchronous & Non synchronous TDM
4. None of the mentioned
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Question 30 : In CSMA, collision window is _____ to cable length.
1. Equal
2. Greater
3. Lesser
4. None of the mentioned
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