What factors need to be considered to
limit the amount of signal attenuation in Ethernet cable
runs? (Choose two.)
type of users
number of users
length of cable
type of electrical
equipment
installation of
connectors on the cable
2
A company needs to extend the LAN to six
separate buildings. To limit the amount of signal
attenuation on the LAN media, what type of media would
be the best to use between the buildings?
air (wireless)
coaxial cable
fiber
shielded twisted
pair
unshielded twisted
pair
3
What is a cause of crosstalk in UTP
cable?
cable pairs that are
shorted
cable pairs crossed
during termination
cabling runs installed
in separate conduit
cable pairs that are
untwisted because of poor termination of the cable
4
Which of the following describes
frequency?
length of each
wave
height of each
wave
number of cycles each
second
amount of time between
each wave
5
How are binary ones and zeros represented
in fiber optic installations? (Choose two.)
+5 volts/-5 volts
0 volts/5 volts
light/no light
high to low electrical
transition
low to high electrical
transition
increasing/decreasing
light intensity
6
What is expected when crosstalk is present
in networks with higher transmission frequencies?
(Choose two.)
jitter
increase in
crosstalk
higher signal
attenuation
increases in
cancellation effect
destruction of more of
the data signal
7
A small company is experiencing
difficulties on its LAN. After performing some tests, a
technician has determined that the copper media
supporting the LAN is experiencing abnormal attenuation.
What are two possible causes of the problem? (Choose
two.)
defective
connectors
excessively long cable
lengths
use of higher grade
cabling
low frequency signals
used in the media
network cable runs
isolated from other
cables
8
To ensure reliable LAN communications,
what should a technician be looking for when attaching
connectors to the ends of UTP cable?
that the
white-orange/orange pair is attached first
that the wire pairs
remain twisted as much as possible
that one end of the
shield is properly ground but not the other
that 50 ohm termination
resistors are on both
ends
9
What conditions are described when
transmission signals from one wire pair affects another
wire pair? (Choose two.)
noise
resistance
mismatch
jitter
crosstalk
attenuation
10
Which of the following are detected by the
wire map test? (Choose three.)