True/False
Indicate whether the
statement is true or false.
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1.
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The strength of an electrical signal is directly proportional to its
frequency.
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2.
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Modulation can be used to make a signal conform to a specific pathway.
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3.
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Ethernet is an example of a baseband system found on many LANs.
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4.
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Latency 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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5.
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The maximum distance a signal can travel and still be interpreted accurately is
equal to a segment’s maximum length.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The distance between corresponding points on a wave’s cycle is called its
____.
a. | amplitude | c. | phase | b. | frequency | d. | wavelength |
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2.
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A digital signal composed of a pulse of positive voltage represents a(n)
____.
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3.
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The byte 00001110 means ____ on a digital network.
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4.
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In modulation, a simple wave called a(n) ____ wave, is combined with another
analog signal to produce a unique signal that gets transmitted from one node to another.
a. | carrier | c. | information | b. | data | d. | FM |
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5.
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When signals are free to travel in both directions over a medium simultaneously,
the transmission is considered ____.
a. | simplex | c. | half-duplex | b. | multiplex | d. | full-duplex |
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6.
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____ is a technology used with fiber-optic cable, which enables one fiber-optic
connection to carry multiple light signals simultaneously.
a. | Statistical multiplexing | b. | WDM (wavelength division multiplexing)
| c. | TDM (time division multiplexing) | d. | FDM (frequency division
multiplexing) |
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7.
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The data transmission characteristic most frequently discussed and analyzed by
networking professionals is ____.
a. | noise | c. | throughput | b. | scalability | d. | cost |
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8.
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One of the most common transmission flaws affecting data signals is ____.
a. | noise | c. | throughput | b. | attenuation | d. | latency |
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9.
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The most significant factor in choosing a transmission method is its
____.
a. | noise | c. | throughput | b. | attenuation | d. | latency |
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10.
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The more twists per foot in a pair of wires, the more resistant the pair will be
to ____.
a. | throughput | c. | cross talk | b. | attenuation | d. | latency |
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11.
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Modern LANs use ____ or higher wiring.
a. | Cat 3 | c. | RG-6 | b. | Cat 5 | d. | RG-59 |
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12.
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Serial refers to a style of data transmission in which the pulses that represent
bits follow one another along a ____ transmission line.
a. | long | c. | secondary | b. | short | d. | single |
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13.
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____ describes a popular serial data transmission method.
a. | EIA/TIA Commercial Building Wiring Standard | b. | EIA/TIA RS-232
(Recommended Standard 232) | c. | EIA/TIA 568A standard | d. | EIA/TIA 568BA
standard |
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14.
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Which connector is used in RS-232 transmissions?
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15.
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The serial interface on the back of the connectivity device is often labeled
“____.”
a. | Connector | c. | Board | b. | Port | d. | Console |
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16.
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Which term describes the hardware that makes up the enterprise-wide cabling
system?
a. | wiring board | c. | network diagram | b. | patch panel | d. | cable plant |
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17.
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Which standard is also known as structured cabling?
a. | TIA/EIA Commercial Building Wiring Standard | b. | TIA/EIA RS-232
(Recommended Standard 232) | c. | TIA/EIA 568A Standard | d. | TIA/EIA 568BA
Standard |
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18.
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The points where circuits interconnect with other circuits is known as
____.
a. | entrance facilities | c. | IDF (intermediate distribution frame) | b. | cross-connect
facilities | d. | telecommunications closet |
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19.
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Which term identifies a room containing connectivity for groups of workstations
in its area?
a. | MDF (main distribution frame) | c. | work area | b. | entrance
facilities | d. | telecommunications closet |
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20.
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____ describes wiring that connects workstations to the closest
telecommunications closet.
a. | Backbone wiring | c. | Work area | b. | Horizontal wiring | d. | Simple wiring |
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21.
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Many network problems can be traced to poor cable ____ techniques.
a. | manufacturing | c. | installation | b. | engineering | d. | planning |
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Completion
Complete each
statement.
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1.
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The use of 1s and 0s to represent information is characteristic of a(n)
____________________ system.
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2.
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____________________ is a term used by networking professionals to describe the
nondata information that must accompany data for a signal to be properly routed and interpreted by
the network.
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3.
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____________________ transmission involves one transmitter and multiple
receivers.
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4.
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____________________ are the pieces of hardware that connect the wire to the
network device.
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5.
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____________________ cabling consists of one or more insulated wire pairs
encased in a plastic sheath.
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Matching
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Match each item with a statement below: a. | bit | f. | populated
segment | b. | data modulation | g. | unpopulated segment | c. | baseband | h. | broadband | d. | EMI (electromagnetic
interference) | i. | nonbroadcast | e. | broadcast |
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1.
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Transmission that involves one transmitter and multiple, undefined
receivers.
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2.
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Transmission that issues signals to multiple, defined recipients.
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3.
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Transmission form in which (typically) digital signals are sent through direct
current (DC) pulses applied to the wire.
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4.
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Part of a network that contains end nodes.
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5.
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A common source of noise.
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6.
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Every pulse in a digital signal.
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7.
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Part of the network that does not contain end nodes.
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8.
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A form of transmission in which signals are modulated as radio frequency (RF)
analog waves that use different frequency ranges.
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9.
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Technology used to modify analog signals to make them suitable for carrying
data over a communication path.
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Short Answer
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1.
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Describe a drawback of analog signals.
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2.
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Describe two benefits of digital signaling that make it worthwhile even though
extra signaling pulses are involved.
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3.
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Explain how half-duplex transmissions work.
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4.
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Describe what FDM (frequency division multiplexing) is and how it works.
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5.
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Describe variables that may influence the final cost of implementing a certain
type of media.
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6.
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Explain the makeup of coaxial cable.
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7.
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Explain the makeup of twisted pair wire.
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8.
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Describe the advantages of twisted pair wiring.
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9.
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Explain the makeup of fiber-optic cable.
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10.
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Describe the benefits of fiber-optic cabling over copper cabling.
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