LAN Switching and Wireless

1. SONET system can use _________.

1. STS multiplexers
2. regenerators
3. add/drop multiplexers
4. all of the above

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2. _________ allow insertion and extraction of signals.

1. regenerators
2. ADMs
3. STS multiplexer/demultiplexers
4. none of the above

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3. _________ are special-interest groups that quickly test, evaluate, and standardize new technologies.

1. Forums
2. Regulatory agencies
3. Standards organizations
4. All of the above

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4. _________ are used for cellular phone, satellite, and wireless LAN communications.

1. Radio waves
2. Microwaves
3. Infrared waves
4. none of the above

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5. _________ augments the CSMA algorithm to detect collision.

1. CSMA/CA
2. CSMA/CD
3. either (a) or (b)
4. both (a) and (b)

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6. _________ cable can carry signals of higher frequency ranges than _________ cable.

1. Twisted-pair; fiber-optic
2. Coaxial; fiber-optic
3. Coaxial; twisted-pair
4. none of the above

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7. _________ cable consists of an inner copper core and a second conducting outer sheath.

1. Twisted-pair
2. Coaxial
3. Fiber-optic
4. Shielded twisted-pair

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8. _________ cable is used for voice and data communications.

1. Coaxial
2. Fiber-optic
3. Twisted-pair
4. none of the above

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9. _________ cables are composed of a glass or plastic inner core surrounded by cladding, all encased in an outside jacket.

1. Coaxial
2. Fiber-optic
3. Twisted-pair
4. none of the above

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10. _________ cables carry data signals in the form of light.

1. Coaxial
2. Fiber-optic
3. Twisted-pair
4. none of the above

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