Chapter 3 Assessment

ASCII is the least popular code for data communications. TRUE/FALSE

False

Frequency division multiplexing divides the circuit into a set of different time slots. TRUE/FALSE

False

Frequency modulation refers to the changing of the height of the sound wave. TRUE/FALSE

False

Of all the media available, fiber optic provides the highest transmission speeds. TRUE/FALSE

True

Signal bandwidth is the difference between the highest and lowest frequencies in a band. TRUE/FALSE

True

___________ is the basic physical layout of the circuit. configuration circuit plan circuit configuration circuit design point-to-point configuration

circuit configuration

Which of the following media has the lowest error rates and the highest transmission speeds? infrared unshielded twisted pair coaxial cable fiber optic cable shielded twisted pair

fiber optic cable

The two basic types of media are: guided and wireless (radiated) attenuator and Gaussian statistical and frequency duplexed and non-duplexed local and wide area

guided and wireless (radiated)

The ability to transmit in both directions, but only in one direction at a time is an example of ___________ transmission. full-duplex analog simplex half-duplex digital

half-duplex

With respect to converting digital data into analog signals, AM stands for: Analog Multimode Analytical Mosaic Amplitude Modulation Asynchronous Manchester Anomaly Multiplexing

Amplitude Modulation

Which of the following would be considered a type of wireless media? microwave fiber optics coaxial cable unshielded twisted pair shielded twisted pair

microwave

__________ refers to changing the shape of the sound wave in different ways to represent a 1 or a 0. modulation sampling digitizing shaping demodulation

modulation

Which of the following is NOT a key advantage of digital transmission? It is more efficient. It is simpler to integrate voice, video, and data on the same circuit. It produces fewer errors. It is more secure. It permits only low transmission rates.

It permits only low transmission rates.

A walkie-talkie is an example of half-duplex transmission. TRUE/FALSE

True

Amplitude, frequency and phase are all characteristics of a sound wave. TRUE/FALSE

True

The height of a sound wave is called its : bandwidth phase frequency amplitude furlong

amplitude

Another term for the weakening of a signal over distance is: attenuation propagation delay insulation turnaround time dispersion

attenuation

__________ refers to the spreading of the signal that different parts of the signal arrive at different times at the destination. attenuation insulation turnaround time propagation delay dispersion

dispersion

Data is physically transmitted from one computer or terminal to another in the ________ layer. data link terminal application transport physical

physical

______________ is NOT a form of modulation used to transform digital data into analog signals. amplitude modulation phase modulation amplitude shift keying frequency modulation synchronous time division

synchronous time division