True/False
Indicate whether the
statement is true or false.
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1.
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Transmission methods using fiber-optic cables achieve faster throughput than
those using copper or wireless connections.
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2.
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Seven bits form a byte.
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3.
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A pulse of positive voltage represents a 0.
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4.
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In frequency modulation, the frequency of the carrier signal is modified by the
application of the data signal.
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5.
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An access point is a device that accepts wireless signals from multiple nodes
and retransmits them to the rest of the network.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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6.
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A wave’s ____ is a measure of its strength at any given point in
time.
a. | voltage | c. | attenuation | b. | amplitude | d. | baseband |
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7.
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The distance between corresponding points on a wave’s cycle is called
its ____.
a. | phase | c. | amplitude | b. | amplitude | d. | wavelength |
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8.
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In cases in which signals may travel in only one direction, the transmission is
considered ____.
a. | simplex | c. | duplex | b. | half-duplex | d. | half-simplex |
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9.
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A form of transmission that allows multiple signals to travel simultaneously
over one medium is known as ____.
a. | Webcasting | c. | reflection | b. | scattering | d. | multiplexing |
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10.
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The loss of a signal’s strength as it travels away from its source is
known as ____.
a. | impedance | c. | regeneration | b. | attenuation | d. | diffraction |
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11.
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A device that regenerates a digital signal is called a(n) ____.
a. | modulator | c. | repeater | b. | multiplexer | d. | sheath |
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12.
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A(n) ____ is a piece of hardware that enables networks or segments running on
different media to interconnect and exchange signals.
a. | media converter | c. | connector | b. | amplifier | d. | modem |
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13.
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____ cable consists of color-coded pairs of insulated copper wires, each with a
diameter of 0.4 to 0.8 mm.
a. | Coaxial | c. | Ethernet | b. | Twisted-pair | d. | Fiber-optic |
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14.
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____ 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.
a. | Fiber-optic | c. | Shielded twisted-pair | b. | Ethernet | d. | Coaxial |
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15.
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____ is a measure of the highest frequency of signal a multimode fiber can
support over a specific distance and is measured in MHz-km.
a. | Broadband | c. | Latency | b. | Modal bandwidth | d. | Plenum |
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16.
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The hardware that makes up the enterprise-wide cabling system is known as the
____.
a. | cable plant | c. | sheath | b. | plenum | d. | thinnet |
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17.
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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) ____.
a. | media converter | c. | conduit | b. | multimode fiber | d. | crossover cable |
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18.
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Networks that transmit signals through the atmosphere via infrared or
radiofrequency (RF) waves are known as ____.
a. | local area networks | c. | wide area network | b. | wireless networks | d. | wireless access
point |
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19.
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An antenna’s ____ describes the relative strength over a three dimensional
area of all the electromagnetic energy the antenna sends or receives.
a. | plenum | c. | radiation pattern | b. | frequency | d. | ferrule |
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20.
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The geographical area that an antenna or wireless system can reach is known as
its ____.
a. | range | c. | bend radius | b. | frequency | d. | ferrule |
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21.
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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?
a. | Latency | c. | Attenuation | b. | Reflection | d. | Fading |
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22.
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In ____, a transmitter concentrates the signal energy at a single frequency or
in a very small range of frequencies.
a. | structured cabling | c. | Webcasting | b. | narrowband | d. | broadband |
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23.
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____ 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.
a. | Attenuation | c. | Infrared | b. | Braiding | d. | Broadcast |
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24.
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When a data transmission involves only one transmitter and one receiver, it is
considered a(n) ____ transmission.
a. | enhanced | c. | full-duplex | b. | crossover | d. | point-to-point |
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25.
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____ 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.
a. | Latency | c. | Modulation | b. | Impedance | d. | Frequency |
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26.
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____ signals are composed of pulses of precise, positive voltages and zero
voltages.
a. | Analog | c. | Narrowband | b. | Digital | d. | Optical |
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Completion
Complete each
statement.
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27.
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When signals are free to travel in both directions over a medium simultaneously,
the transmission is considered ______________________________.
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28.
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____________________ is the measure of how much data is transmitted during a
given period of time.
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29.
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____________________ occurs when a signal traveling on one wire or cable
infringes on the signal traveling over an adjacent wire or cable.
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30.
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____________________ are the pieces of hardware that connect the wire to the
network device, be it a file server, workstation, switch, or printer.
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31.
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A(n) ____________________ is a device that transmits and receives
signals.
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Matching
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Match each term with the correct statement below. a. | Phase | f. | Punch-down block | b. | Overhead | g. | Wireless spectrum | c. | Channel | h. | Directional antenna | d. | TDM | i. | Omnidirectional antenna | e. | 10BASE-T |
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32.
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A distinct communication path between nodes, much as a lane is a distinct
transportation path on a freeway.
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33.
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A panel of data receptors into which horizontal cabling from the
workstations is inserted.
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34.
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The progress of a wave over time in relationship to a fixed point.
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35.
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A continuum of electromagnetic waves used for data and voice
communication.
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36.
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The nondata information that must accompany data for a signal to be properly
routed and interpreted by the network.
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37.
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Follows the 5-4-3 rule of networking.
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38.
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Issues wireless signals along a single direction.
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39.
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Issues and receives wireless signals with equal strength and clarity in all
directions.
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40.
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Divides a channel into multiple intervals of time, or time slots.
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Short Answer
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41.
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What is the difference between baseband and broadband?
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42.
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Briefly discuss four variables that can influence the final cost of implementing
a certain kind of media.
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43.
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What is the difference between a populated segment and an unpopulated
segment?
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44.
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What steps would you take to limit the impact of noise on your network?
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45.
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Provide a brief description of the following standards: CAT 3 (Category 3), CAT
4 (Category 4), and CAT 5 (Category 5).
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46.
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What are some of the similarities and differences shared by shielded twisted
pair (STP) and unshielded twisted pair (UTP)?
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47.
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What are the advantages of using fiber optic cable?
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48.
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What are the characteristics of fiber-optic cable?
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49.
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Provide a brief description of the following terms: diffraction and
scattering.
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50.
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Provide a brief description of the following terms: equipment room,
telecommunications closet and horizontal wiring.
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