CCNA Exploration v4 - Network Fundamentals - Chapter 08
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@random

What are three measures of data transfer? (Choose three.)
*goodput
frequency 
amplitude 
*throughput 
crosstalk 
*bandwidth

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

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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? 
coax cable 
rollover cable 
*crossover cable 
straight-through cable

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

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

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

An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device? 
light injector 
*OTDR 
TDR 
multimeter

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

Which method of signal transmission uses radio waves to carry signals? 
electrical 
optical 
*wireless 
acoustic

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 pairs 
the reflection of the electrical wave back from the far end of the cable 
the collision caused by two nodes trying to use the media simultaneously

In most business LANs, which connector is used with twisted-pair networking cable? 
BNC 
RJ-11 
*RJ-45 
Type F

Which type of cable run is most often associated with fiber-optic cable? 
*backbone cable 
horizontal cable 
patch cable 
work area cable

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.

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Which fiber connector supports full duplex Ethernet?
A
*B
C
D

Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication? 
Presentation 
Transport 
Data Link 
*Physical

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.

When is a straight-through cable used in a network? 
when connecting a router through the console port 
when connecting one switch to another switch 
*when connecting a host to a switch 
when connecting a router to another router