Exam 6: Data Link Control and Multiplexing

The organization sacrifices efficiency when it wastes money on communication lines with capacities that are much higher than it needs.

A data link control protocol includes techniques for regulating the flow of data over a communications link and for compensating for transmission errors.

Sliding window is one form of error control.

In order to achieve the greatest return on their data communication investments,it is important for businesses to maximize the amount of information carried over their transmission lines.

Present-day television,both broadcast and cable,employ:

To prevent interference,the channels are separated by ________,which are unused portions of the spectrum.

Stop-and-wait is the simplest form of flow control.

Flow control is one of the primary functions performed at the data link layer of the OSI reference model for network communication.

________ is used in fiber-to-the-home (FTTH)systems.

_________ is possible when the data rate of the transmission medium exceeds the required data rate of signals to be transmitted and a number of digital signals,or analog signals carrying digital data,can be carried simultaneously by interleaving portions of each signal in time.

Which of the following is a common technique for error control?

Data link control protocols are only used in private WANs.

________ refers to a connection's ability to weather changes to topology,protocol,and speed as a user moves.

Most cordless digital telephone systems used in homes employ ________ or time division duplexing along with FDM.

Sharing capacity with other communication devices is multiplexing.

SONET / SDH signal payload speeds range:

The data transmitted by a synchronous TDM system are organized into ________,each of which contains a cycle of time slots.

With ________ the light steaming through the fiber consists of many colors,or wavelengths,each carrying a separate channel of data.

The set of time slots dedicated to one source,from frame to frame,is called a ________.

Although the use of ________ for voice transmission is declining,it is still used widely for television distribution systems,including broadcast television and cable TV.