Exam 8: Data and Network Communication Technology

In synchronous transmissions, messages are transmitted in fixed-size byte groups called ____.

​____ is noise added to the signal in the wire from EMI generated by adjacent wires.

Messages can be loosely categorized into two types-data messages and command messages.​

​Why are waves important in communication?

The term ____________________ refers to changes to the data signal caused by interaction with the communication channel.

____________________ is a measure of wave height or power-the maximum distance between a wave's peak and its zero value.

​A(n) ____________________ signal uses the full range of a carrier wave characteristic to encode continuous data values.

____ describes techniques for splitting data transfer capacity into time slices and allocating them to multiple users.

​The difference between a signal's maximum and minimum frequencies is called the signal ____________________.

____________________ mode allows the receiver to request retransmitting a message if it detects errors.

​Communication line cost is the same in simplex and half-duplex modes.

​Light, radio frequencies, and electricity travel through space or cables as a(n) ____________________.

​CRC has much higher Type I and Type II error rates than parity and block checking.

Communication protocols are less important for computer-to-computer communication than for person-to-person communication.

​____________________ transmission uses only a single transmission line and a return wire.

​Bits are encoded in a wave by precisely manipulating, or modulating, amplitude, frequency, or phase.

​A(n) ____________________ is a unit of data or information transmitted from a sender to a recipient.

​Asynchronous transmission uses channel capacity more efficiently than synchronous transmission.

​In a single communication channel a ____ wire completes an electrical circuit between sending and receiving devices.

Describe some options regarding light transmission in communication technology.​