Exam 8: Data and Network Communication Technology

​____________________ is the reduction in signal strength (amplitude) caused by interactions between the signal's energy and the transmission medium.

​In half-duplex mode after sending a message, the first node signals its intent to cease transmission by sending a special control message called a(n) ____________________.

​Under FDM, a single narrowband channel is partitioned into multiple broadband subchannels.

Command messages can be used to transmit information about data messages, such as format, content, length, and other information the receiver needs to interpret the data message correctly.

​____ cable can be constructed of glass or plastic.

​Because block size is always the same in synchronous transmission, the receiver always knows where one block ends and another begins.

____ is a high-speed communication architecture intended to interconnect devices such as servers, secondary storage appliances, and network switches.

Sender and received can use different methods of encoding, transmitting, and interpreting the bits of a message.

​____ represents bit values by varying carrier wave frequency while holding amplitude constant.

Square waves are the preferred method of transmitting digital data over short distances, such as on a system bus.

​A(n) ____________________ consists of a sending device, a receiving device, and the transmission medium connecting them.

​Noise can be introduced into copper, aluminum, and other wire types by ____.

​____________________ transmission ensures that sender and receiver clocks are always synchronized by sending continuous data streams.

The FM method holds frequency constant while varying amplitude to represent data.

​Unlike block checking, CRC cannot produce a BCC for a group of characters or bytes.

​Parity checking can be based on even or odd bit counts.

​Narrowband channels in a single broadband channel must use the same signaling methods, communication protocols, and transmission speeds.

​Parity checking has a low Type I error rate.

Wave characteristics, such as frequency and amplitude, are inherently discrete.

​A crucial component of any communication protocol is a method for detecting and correcting errors in data transmission, reception, or interpretation.