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What is a primary role of the Physical layer in transmitting data on the network?
create the signals that represent the bits in each frame on to the media
provide physical addressing to the devices
determine the path packets take through the network
control data access to the media
create the signals that represent the bits in each frame on to the media
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What characteristic of UTP cable helps reduce the effects of interference?
the metal braiding in the shielding
the reflective cladding around core
the twisting of the wires in the cable
the insulating material in the outer jacket
the twisting of the wires in the cable
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What is considered a benefit of wireless as a media choice?
more host mobility
lower security risks
reduced susceptibility to interference
less impact of the surroundings on the effective coverage area
more host mobility
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Which of the following is a characteristic of single-mode fiber-optic cable?
generally uses LEDs as the light source
relatively larger core with multiple light paths
less expensive than multimode
generally uses lasers as the light source
generally uses lasers as the light source
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Which characteristics describe fiber optic cable? (Choose two.)
It is not affected by EMI or RFI.
Each pair of cables is wrapped in metallic foil.
It combines the technique of cancellation, shielding and twisting to protect data.
It has a maximum speed of 100 Mbps.
It is the most expensive type of LAN cabling.
It is not affected by EMI or RFI.
It is the most expensive type of LAN cabling.
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Which method of signal transmission uses radio waves to carry signals?
electrical
optical
wireless
acoustic
wireless
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In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?
coax
fiber
Cat5e UTP
Cat6 UTP
STP
fiber
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Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?
Crossover cable
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What are three measures of data transfer? (Choose three.)
throughput, goodput, and bandwidth
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What is a possible effect of improperly applying a connector to a network cable?
Data transmitted through that cable may experience signal loss.
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XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.)
Cat5 UTP, Cat6 UTP
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An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
OTDR
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Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
Physical
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With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
the magnetic field around the adjacent pairs of wire
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When is a straight-through cable used in a network?
when connecting a host to a switch
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In most business LANs, which connector is used with twisted-pair networking cable?
RJ-45
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Which type of cable run is most often associated with fiber-optic cable?
backbone cable
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