Exam 8: Multiplexing

The multiplexer combines data from the input lines and transmits over a lower capacity data link.

Typically two communicating stations will not utilize the full capacity of a data link.

From customer to carrier is ________.

A form of frequency division multiplexing where the light streaming through the fiber consists of many colors,or wavelengths,each carrying a separate channel of data is ________ multiplexing.

The ________ multiplexing is the most heavily used.A familiar example is broadcast and cable television.

With ________ multiplexing a number of signals are carried simultaneously on the same medium by allocating to each signal a different frequency band.

Synchronous time division multiplexing is possible when the achievable data rate of the medium exceeds the data rate of digital signals to be transmitted.

FDMA is a technique used to share the spectrum among multiple stations.

The higher the data rate,the least cost-effective the transmission facility.

To support data transfer to and from a cable modem,a cable TV provider dedicates ________ channels.

Frequency division multiplexing can be used with ________ signals.

Large numbers of voice and data transmissions can be carried simultaneously using multiplexing.

The long distance carrier system provided in the US and throughout the world was designed to transmit voice signals over high capacity transmission links such as optical fiber,coaxial cable,and microwave.

An individual cable modem subscriber may experience access speeds from 500 kbps to 1.5 Mbps or more,depending on the network architecture and traffic load.

Flow control and error control can be provided on a per-channel basis by using a data link control protocol such as HDLC.

The ________ accepts the multiplexed data stream,separates the data according to channel,and delivers data to the appropriate output lines.

The true potential of optical fiber is fully exploited when multiple beams of light at different frequencies are transmitted on the same fiber.

The transmitted data in synchronous TDM are organized into ________.

At a higher level of utilization a larger buffer is needed to hold the backlog.

An optical transmission interface originally proposed by BellCore and standardized by ANSI is ________.It is intended to provide a specification for taking advantage of the high speed digital transmission capacity of optical fiber.