LAN Switching and Wireless

221. Devices may be arranged in a _________ topology.

1. mesh
2. ring
3. bus
4. all of the above

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222. DH has defined a hierarchy of signals called _________.

1. STSs
2. STMs
3. either (a) or (b)
4. neither (a) nor (b)

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223. DMT is a modulation technique that combines elements of _________ and _________.

1. FDM; TDM
2. QDM; QAM
3. FDM; QAM
4. PSK; FSK

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224. Each _________ in a SONET frame can carry a digitized voice channel.

1. bit
2. byte
3. frame
4. none of the above

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225. Each station on an Ethernet network has a unique _________ address imprinted on its network interface card (NIC).

1. 5-byte
2. 32-bit
3. 48-bit
4. none of the above

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226. Ethernet uses a _________ physical address that is imprinted on the network interface card (NIC).

1. 32-bit
2. 64-bit
3. 6-byte
4. none of the above

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227. Fast Ethernet has a data rate of _________Mbps.

1. 10
2. 100
3. 1000
4. 10,000

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228. Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/24.

1. 32
2. 64
3. 256
4. none of the above

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229. Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/30.

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

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230. For a _________ channel, the Nyquist bit rate formula defines the theoretical maximum bit rate.

1. noisy
2. noiseless
3. bandpass
4. low-pass

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