Network+ Guide to Networks - Chapter 3

40 terms by summeranne Plus

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True

T/F: Transmission methods using fiber-optic cables achieve faster throughput than those using copper or wireless connections.

False

T/F: Seven bits form a byte.

False

T/F: A pulse of positive voltage represents a 0.

True

T/F: In frequency modulation, the frequency of the carrier signal is modified by the application of the data signal.

True

T/F: An access point is a device that accepts wireless signals from multiple nodes and retransmits them to the rest of the network.

amplitude

A wave's ____ is a measure of its strength at any given point in time.

wavelength

The distance between corresponding points on a wave's cycle is called its ____.

simplex

In cases in which signals may travel in only one direction, the transmission is considered ____.

multiplexing

A form of transmission that allows multiple signals to travel simultaneously over one medium is known as ____.

attenuation

The loss of a signal's strength as it travels away from its source is known as ____.

repeater

A device that regenerates a digital signal is called a(n) ____.

media converter

A(n) ____ is a piece of hardware that enables networks or segments running on different media to interconnect and exchange signals.

twisted-pair

____ cable consists of color-coded pairs of insulated copper wires, each with a diameter of 0.4 to 0.8 mm.

shielded twisted-pair

____ cable consists of twisted wire pairs that are not only individually insulated, but also surrounded by a shielding made of a metallic substance such as foil.

modal bandwidth

____ is a measure of the highest frequency of signal a multimode fiber can support over a specific distance and is measured in MHz-km.

cable plant

The hardware that makes up the enterprise-wide cabling system is known as the ____.

crossover cable

A patch cable in which the termination locations of the transmit and receive wires on one end of the cable are reversed is known as a(n) ____.

wireless networks

Networks that transmit signals through the atmosphere via infrared or radiofrequency (RF) waves are known as ____.

radiation pattern

An antenna's ____ describes the relative strength over a three dimensional area of all the electromagnetic energy the antenna sends or receives.

range

The geographical area that an antenna or wireless system can reach is known as its ____.

fading

Which of the following terms refers to a change in signal strength as a result of some of the electromagnetic energy being scattered, reflected, or diffracted after being issued by the transmitter?

narrowband

In ____, a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies.

infared

____ signals are transmitted by frequencies in the 300- GHz to 300,000-GHz range, which is just above the top of the wireless spectrum as it is defined by the FCC.

point-to-point

When a data transmission involves only one transmitter and one receiver, it is considered a(n) ____ transmission.

frequency

____ is the number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time.

digital

____ signals are composed of pulses of precise, positive voltages and zero voltages.

full duplex

When signals are free to travel in both directions over a medium simultaneously, the transmission is considered _____.

throughput

_______ is the measure of how much data is transmitted during a given period of time.

cross talk

_______ occurs when a signal traveling on one wire or cable infringes on the signal traveling over an adjacent wire or cable.

connectors

________ are the pieces of hardware that connect the wire to the network device, be it a file server, workstation, switch, or printer.

transreceiver

A(n) ____________________ is a device that transmits and receives signals.

TDM

Divides a channel into multiple intervals of time, or time slots.

directional antenna

Issues wireless signals along a single direction.

phase

The progress of a wave over time in relationship to a fixed point.

10Base-T

Follows the 5-4-3 rule of networking.

punch-down block

A panel of data receptors into which horizontal cabling from the workstations is inserted.

overhead

The nondata information that must accompany data for a signal to be properly routed and interpreted by the network.

omnidirectional antenna

Issues and receives wireless signals with equal strength and clarity in all directions.

channel

A distinct communication path between nodes, much as a lane is a distinct transportation path on a freeway.

wireless spectrum

A continuum of electromagnetic waves used for data and voice communication.

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