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lehuy0305's Blog

Module4_S1

1.

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
2.
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
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

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

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

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

Which of the following are detected by the wire map test? (Choose three.)
	near-end crosstalk (NEXT)
	opens
	propagation delay
	return loss
	reversed-pair faults
	short circuits

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

What conditions are described when transmission signals from one wire pair affects another wire pair? (Choose two.)
	noise
	resistance mismatch
	jitter
	crosstalk
	attenuation

10.

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

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

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