LAN Switching and Wireless

611. The purpose of the _________ is to provide flow and error control for the upper-layer protocols that actually demand these services

1. MAC
2. LLC
3. LLU
4. none of the above

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612. The RTS and CTS frames in CSMA/CA _________ solve the hidden station problem. The RTS and CTS frames in CSMA/CA _________ solve the exposed station problem.

1. can; cannot
2. cannot; can
3. can; can
4. cannot; cannot

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613. The second generation of cable networks is called a(n) _________ network.

1. HF
2. HCF
3. CFH
4. none of the above

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614. The section overhead consists of _________octets.

1. 1
2. 6
3. 9
4. 18

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615. The session, presentation, and application layers are the _________ support layers.

1. user
2. network
3. both (a) and (b)
4. neither (a) nor (b)

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616. The seven-layer _________ model provides guidelines for the development of universally compatible networking protocols.

1. OSI
2. ISO
3. IEEE
4. none of the above

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617. The sharing of a medium and its link by two or more devices is called _________.

1. modulation
2. encoding
3. line discipline
4. multiplexing

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618. The signal from a satellite is normally aimed at a specific area called the __________.

1. path
2. effect
3. footprint
4. none of the above

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619. The signal rate is sometimes called the _________ rate.

1. baud
2. bit
3. signal
4. none of the above

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620. The Simplest Protocol and the Stop-and-Wait Protocol are for _________ channels.

1. noisy
2. noiseless
3. either (a) or (b)
4. neither (a) nor (b)

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