LAN Switching and Wireless

171. A(n) _________ medium provides a physical conduit from one device to another.

1. guided
2. unguided
3. either (a) or (b)
4. none of the above

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172. A(n)_________ signal is a composite analog signal with an infinite bandwidth.

1. digital
2. analog
3. either (a) or (b)
4. neither (a) nor (b)

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173. Adding 1 and 1 in modulo-2 arithmetic results in __________.

1. 1
2. 2
3. 0
4. none of the above

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174. AM and FM are examples of _________ conversion.

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

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175. AMPS has a frequency reuse factor of __________.

1. 1
2. 3
3. 5
4. 7

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176. AMPS operates in the ISM __________ band.

1. 800-MHz
2. 900-MHz
3. 1800-MHz
4. none of the above

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177. AMPS uses __________ to divide each 25-MHz band into channels.

1. FDMA
2. TDMA
3. CDMA
4. none of the above

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178. An add/drop multiplexer is a _________ device.

1. one-layer
2. two-layer
3. three-layer
4. four-layer

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179. An IPv4 address consists of _________ bits.

1. 4
2. 8
3. 32
4. 64

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180. An IPv6 address can have up to _________ colons.

1. 8
2. 7
3. 4
4. none of the above

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