Computer Networks

221. Disadvantages of cell relay are

1. Cell discarding occurs with congestion
2. High cost
3. Both a & b
4. None of these

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222. Distance vector protocols are

1. RIP
2. IGRP(Interior Gateway Routing Protocol )
3. Both a & b
4. None of these

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223. Distortion is calculated as the ratio of the

1. Signal at two different points
2. Relative power of two signals at the same point
3. Both a & b
4. None of these

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224. Distortion is proportional to the square of the ____________

1. Atmospheric conditions
2. Modulation techniques
3. Operating frequency
4. Operating system

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225. DLCI can have a value between

1. 0 and 1025
2. 0 and 125
3. 0 and 256
4. 0 and 1023

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226. Donald Murray modification took a shape as

1. International Telegraph Alphabet 1
2. International Telephone Alphabet 1
3. International Television Alphabet 1
4. International Telegram Alphabet 1

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227. DS0 channel is a

1. 68Kbit/s
2. 64Kbit/s
3. 62Kbit/s
4. 70Kbit/s

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228. DS-1 conveys the meaning of

1. Direct Service-Level 1
2. Digital Service-Level 1
3. Double Service-Level 1
4. Digital Slide-Level 1

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229. DS1 is full-duplex circuit in which the circuit does concurrent transmission and reception at a data rate of

1. 1.533Mbit/s
2. 1.544Mbit/s
3. 1.566Mbit/s
4. 1.555Mbit/s

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230. Dual tone signals are used for various control purposes via the

1. Telephone network
2. Different from dual pulses
3. Both a & b
4. None of these

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