LAN Switching and Wireless

191. An STS-1 frame is made of _________ rows

1. 1
2. 9
3. 90
4. none of the above

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192. An STS-3 frame is made of _________ columns.

1. 9
2. 90
3. 270
4. none of the above

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193. An STS-3 frame is made of _________ rows.

1. 1
2. 9
3. 27
4. none of the above

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194. An unauthorized user is a network _________ issue.

1. Performance
2. Reliability
3. Security
4. All the above

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195. Analog-to-analog conversion is needed if the available bandwidth is _________.

1. low-pass
2. band-pass
3. either (a) or (b)
4. neither (a) nor (b)

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196. Another name for the cable TV office is the _________.

1. splitter
2. fiber node
3. combiner
4. head end

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197. ARQ stands for _________.

1. Automatic repeat quantization
2. Automatic repeat request
3. Automatic retransmission request
4. Acknowledge repeat request

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198. As frequency increases, the period _________.

1. decreases
2. increases
3. remains the same
4. doubles

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199. As the data packet moves from the upper to the lower layers, headers are _________.

1. Added
2. Removed
3. Rearranged
4. Modified

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200. ASK, PSK, FSK, and QAM are examples of _________ conversion.

1. digital-to-digital
2. digital-to-analog
3. analog-to-analog
4. analog-to-digital

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