Computer Networks

281. For demodulation, it needs the carrier frequency to be generated or derived at the receiving location known as

1. DSB-SC
2. DBS-CS
3. BDS-SC
4. BSD-CS

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282. For LAN to LAN connection, which are mainly used

1. ISDN
2. Leased Line
3. Frame relay
4. All of these

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283. For large load on router, the processing is

1. Complex
2. Simple
3. Both a & b
4. None of these

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284. For optical fibre media , which PMD is used

1. TP-PMD
2. Fibre PMD
3. Both a & b
4. None of these

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285. For terminate PPP ,the four steps are

1. Link establishment
2. Link configuration negotiation
3. Configuration acknowledgement frame
4. Configuration terminates
5. All of these

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286. For two computers to reliably exchange data, they must have a

1. compatible implementation of encoding
2. interpreting data carrying electrical signals
3. Both a & b
4. None of these

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287. Frame control is also used to specify the ____________

1. Frame technique
2. Frame type
3. Both a & b
4. None of these

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288. Frame relay constitutes of the OSI ____________ layer

1. First
2. Second
3. Third
4. Fourth

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289. Frame relay indicates network congestion using two flags namely ____________ bits in data frames

1. Forward Explicit Congestion Notification(FECN)
2. Backward Explicit Congestion Notification(BECN)
3. Both a & b
4. None of these

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290. Frames of secondary station are known as ____________ are sent only on request by the primary station

1. Response
2. Responses frame
3. Both a & b
4. None of these

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