LAN Switching and Wireless

681. When propagation speed is multiplied by propagation time, we get the _________.

1. throughput
2. wavelength of the signal
3. distortion factor
4. distance a signal or bit has traveled

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682. When the angle of incidence is _________ the critical angle, the light beam bends along the interface.

1. more than
2. less than
3. equal to
4. none of the above

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683. Which address could be the beginning address of a block of 16 classless addresses?

1. 2.4.6.5
2. 2.4.6.15
3. 2.4.6.62
4. none of the above

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684. Which address could be the beginning address of a block of 256 classless addresses?

1. 2.4.6.5
2. 2.4.6.15
3. 2.4.6.0
4. none of the above

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685. Which address could be the beginning address of a block of 32 classless addresses?

1. 2.4.6.5
2. 2.4.6.16
3. 2.4.6.64
4. none of the above

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686. Which agency developed standards for physical connection interfaces and electronic signaling specifications?

1. EIA
2. ITU-T
3. ANSI
4. ISO

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687. Which encoding method uses alternating positive and negative values for 1s?

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

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688. Which error detection method consists of just one redundant bit per data unit?

1. Simple parity check
2. Two-dimensional parity check
3. CRC
4. Checksum

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689. Which error detection method uses one's complement arithmetic?

1. Simple parity check
2. Two-dimensional parity check
3. CRC
4. Checksum

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690. Which multiplexing technique involves signals composed of light beams?

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

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