LAN Switching and Wireless

141. A _________receives a signal and, before it becomes too weak or corrupted, regenerates the original bit pattern. It then sends the refreshed signal.

1. passive hub
2. repeater
3. bridge
4. router

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142. A backbone is usually a _________.

1. bus
2. star
3. either (a) or (b)
4. neither (a) nor (b)

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143. A Bluetooth network consists of _________ primary device(s) and up to _________ secondary devices.

1. one; five
2. five; three
3. two; six
4. one; seven

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144. A Bluetooth network is called a _________.

1. piconet
2. scatternet
3. bluenet
4. none of the above

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145. A bridge can use the _________ algorithm to create a loopless topology.

1. binary tree
2. spanning tree
3. multiway tree
4. none of the above

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146. A burst error means that two or more bits in the data unit have changed.

1. double-bit
2. burst
3. single-bit
4. none of the above

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147. A constellation diagram shows us the _________ of a signal element, particularly when we are using two carriers (one in-phase and one quadrature).

1. amplitude and phase
2. amplitude and frequency
3. frequency and phase
4. none of the above

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148. A generator that contains a factor of __________ can detect all odd-numbered errors.

1. x
2. x + 1
3. 1
4. none of the above

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149. A GEO is at the __________ orbit and revolves in phase with Earth.

1. equatorial
2. polar
3. inclined
4. none of the above

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150. A linear SONET network can be _________.

1. point-to-point
2. multipoint
3. either (a) or (b)
4. neither (a) nor (b)

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