Compression means processing data in such a way that the size of the data, or th

Question

Compression means processing data in such a way that the size of the data, or the bandwidth required to transmit the data, is reduced.

a) True b) False

A LAN is typically owned by a single organization, usually the same organization which owns the computers and other devices attached to the LAN.

a) True b) False

The OSI model has six layers, while the TCP protocol stack is usually represented with five layers.

a) True b) False

A protocol provides a set of rules for the exchange of data between systems.

a) True b) False

A circuit-switching network uses small chunks of data forwarded from node to node; different chunks may take different paths through the network.

a) True b) False

Flow control allows the receiver to ask the sender to slow down its data transmission.

a) True b) False

Error detection allows the receiver to correct errors in the received data without asking the sender to re-transmit.

a) True b) False

In full-duplex communication, hosts can transmit and they can receive, but they cannot do both at the same time (e.g. when transmitting they cannot receive).

a) True b) False

A digital signal maintains a constant level for a period of time, then abruptly changes to a different level.

a) True b) False

In general, the equipment for sending and receiving digital data using digital signals is less expensive than the equipment for sending digital data using analog signals.

a) True b) False

All transmission systems have some rate of transmission errors.

a) True b) False

The receiver needs to synchronize to, or "clock", the digital transmission in order to determine the time of day.

a) True b) False

Sliding-window flow control mechanisms allow more than one packet to be "in the pipe" at the same time. This allows sliding-window flow control to make better use of network capacity than stop-and-wait flow control.

a) True b) False

Forward Error Correction (FEC) is often used with wireless transmission, because error rates are higher and retransmission more costly than with guided transmission media.

a) True b) False

Switches and routers are the core of today's networks; hubs and bridges are largely obsolete.

a) True b) False

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