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Network+ Guide to Networks, Fourth Edition
Chapter 3
Checkup
True or False
1. Transmission methods using fiber-optic cables achieve
faster throughput than those using copper or wireless
connections.
2. Seven bits form a byte.
3. A pulse of positive voltage represents a 0.
4. In frequency modulation, the frequency of the carrier signal
is modified by the application of the data signal.
5. An access point is a device that accepts wireless signals
from multiple nodes and retransmits them to the rest of the
network.
True or False
1. Transmission methods using fiber-optic cables achieve
faster throughput than those using copper or wireless
connections.
2. Seven bits form a byte.
3. A pulse of positive voltage represents a 0.
4. In frequency modulation, the frequency of the carrier signal
is modified by the application of the data signal.
5. An access point is a device that accepts wireless signals
from multiple nodes and retransmits them to the rest of the
network.
Multiple Choice
1.
The distance between corresponding points on a wave’s cycle is called its ____.
a. Phase
c. amplitude
b. Amplitude
d. wavelength
2.
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
3.
_____ 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
4.
____ 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
5.
____ 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
Multiple Choice
6.
The hardware that makes up the enterprise-wide cabling system is known as the ____.
a.
cable plant
c.
sheath
b.
plenum
d.
thinnet
7.
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
8.
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
9.
____ 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
10. ____ signals are composed of pulses of precise, positive voltages and zero voltages.
a.
Analog
c.
Narrowband
b.
Digital
d.
Optical
Multiple Choice
1.
The distance between corresponding points on a wave’s cycle is called its ____.
a. Phase
c. amplitude
b. Amplitude
d. wavelength
2.
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
3.
_____ 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
4.
____ 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
5.
____ 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
Multiple Choice
6.
The hardware that makes up the enterprise-wide cabling system is known as the ____.
a.
cable plant
c.
sheath
b.
plenum
d.
thinnet
7.
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
8.
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
9.
____ 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
10. ____ signals are composed of pulses of precise, positive voltages and zero voltages.
a.
Analog
c.
Narrowband
b.
Digital
d.
Optical