LAN Switching and Wireless

691. Which multiplexing technique shifts each signal to a different carrier frequency?

1. FDM
2. TDM
3. Both (a) and (b)
4. None of the above

View answer

692. Which multiplexing technique transmits analog signals?

1. FDM
2. TDM
3. WDM
4. (a) and (c)

View answer

693. Which multiplexing technique transmits digital signals?

1. FDM
2. TDM
3. WDM
4. None of the above

View answer

694. Which of the following could not be an Ethernet multicast destination?

1. B7:7B:6C:DE:10:00
2. 7B:AA:C1:23:45:32
3. 7C:56:21:1A:DE:F4
4. 83:32:21:21:4D:34

View answer

695. Which of the following could not be an Ethernet unicast destination?

1. 43:7B:6C:DE:10:00
2. 44:AA:C1:23:45:32
3. 46:56:21:1A:DE:F4
4. 48:32:21:21:4D:34

View answer

696. Which of the following encoding methods does not provide for synchronization?

1. NRZ-L
2. RZ
3. NRZ-I
4. Manchester

View answer

697. Which of the following is an application layer service?

1. Remote log-in
2. File transfer and access
3. Mail service
4. All the above

View answer

698. Which of the following is not a digital-to-analog conversion?

1. ASK
2. PSK
3. FSK
4. AM

View answer

699. Which of the following is not a guided medium?

1. twisted-pair cable
2. coaxial cable
3. fiber-optic cable
4. atmosphere

View answer

700. Which of the following is not an analog-to-analog conversion?

1. AM
2. PM
3. FM
4. QAM

View answer