LAN Switching and Wireless

531. The _________ layer is the layer closest to the transmission medium.

1. Physical
2. Data link
3. Network
4. Transport

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532. The _________ layer lies between the network layer and the application layer.

1. Physical
2. Data link
3. Transport
4. None of the above

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533. The _________ layer links the network support layers and the user support layers.

1. transport
2. network
3. data link
4. session

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534. The _________ layer of Ethernet consists of the LLC sublayer and the MAC sublayer.

1. data link
2. physical
3. network
4. none of the above

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535. The _________ model shows how the network functions of a computer ought to be organized.

1. CCITT
2. OSI
3. ISO
4. ANSI

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536. The _________ of a composite signal is the difference between the highest and the lowest frequencies contained in that signal.

1. frequency
2. period
3. bandwidth
4. amplitude

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537. The _________ Protocol has flow control, but not error control.

1. Stop-and-Wait
2. Simplest
3. Go-Back-N ARQ
4. Selective-Repeat ARQ

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538. The _________ Protocol has neither flow nor error control.

1. Stop-and-Wait
2. Simplest
3. Go-Back-N ARQ
4. Selective-Repeat ARQ

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539. The _________ scheme uses data patterns of size 2 and encodes the 2-bit patterns as one signal element belonging to a four-level signal.

1. 4B5B
2. 2B1Q
3. MLT-3
4. none of the above

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540. The _________ scheme uses three levels (+V, 0, and -V) and three transition rules to move between the levels.

1. 4B5B
2. 2B1Q
3. MLT-3
4. none of the above

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