LAN Switching and Wireless

591. The modern telephone network is now _________.

1. digital
2. analog
3. digital as well as analog
4. none of the above

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592. The most common protocol for point-to-point access is the Point-to-Point Protocol (PPP), which is a _________protocol.

1. bit-oriented
2. byte-oriented
3. character-oriented
4. none of the above

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593. The most common technique to change an analog signal to digital data is called _________.

1. PAL
2. PCM
3. sampling
4. none of the above

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594. The most popular technology in time-division switching is called the _________.

1. ST
2. ITS
3. TSI
4. none of the above

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595. The network layer in the Internet is designed as a __________________ network.

1. virtual-circuit
2. datagram
3. circuit-switched
4. none of the above

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596. The number of addresses assigned to an organization in classless addressing _________.

1. can be any number
2. must be a multiple of 256
3. must be a power of 2
4. none of the above

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597. The number of addresses in a class A block is _________.

1. 65,534
2. 16,777,216
3. 256
4. none of the above

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598. The number of addresses in a class B block is _________.

1. 65,536
2. 16,777,216
3. 256
4. none of the above

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599. The number of addresses in a class C block is _________.

1. 65,534
2. 16,777,216
3. 256
4. none of the above

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600. The Nyquist theorem specifies the minimum sampling rate to be_________.

1. equal to the lowest frequency of a signal
2. equal to the highest frequency of a signal
3. twice the bandwidth of a signal
4. twice the highest frequency of a signal

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