Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
PresentationTransportData LinkPhysical
An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
light injectorOTDR TDRmultimeter
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.
When is a straight-through cable used in a network?
when connecting a router through the console portwhen connecting one switch to another switchwhen connecting a host to a switchwhen connecting a router to another router
Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?
coax cablerollover cablecrossover cablestraight-through cable
Which method of signal transmission uses radio waves to carry signals?
electricalopticalwireless acoustic
In most business LANs, which connector is used with twisted-pair networking cable?
BNCRJ-11RJ-45 Type F
Which of the following is a characteristic of single-mode fiber-optic cable?
generally uses LEDs as the light sourcerelatively larger core with multiple light pathsless expensive than multimodegenerally uses lasers as the light source
Which type of cable run is most often associated with fiber-optic cable?
backbone cable horizontal cablepatch cablework area cable
What are three measures of data transfer? (Choose three.)
goodput frequencyamplitudethroughput crosstalkbandwidth
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 the use of braided wire to shield the adjacent wire pairsthe reflection of the electrical wave back from the far end of the cablethe collision caused by two nodes trying to use the media simultaneously
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 devicesdetermine the path packets take through the networkcontrol data access to the media
In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?
coaxfiber Cat5e UTPCat6 UTPSTP
What is a possible effect of improperly applying a connector to a network cable?
Data will be forwarded to the wrong node.Data transmitted through that cable may experience signal loss. An improper signaling method will be implemented for data transmitted on that cable.The encoding method for data sent on that cable will change to compensate for the improper connection.
Which fiber connector supports full duplex Ethernet?
What is considered a benefit of wireless as a media choice?
more host mobility lower security risksreduced susceptibility to interferenceless impact of the surroundings on the effective coverage area
What characteristic of UTP cable helps reduce the effects of interference?
the metal braiding in the shieldingthe reflective cladding around corethe twisting of the wires in the cable the insulating material in the outer jacket
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