K2 Stuctured cabling and K8

Question 1

point of demarcation

Answer 1

the point at which the service provider terminates

Question 2

List three network topologies

Answer 2

Bus
Star
Ring

Question 3

UTP

Answer 3

Unshielded twisted pair

Question 4

STP

Answer 4

Shielded twisted-pair

Question 5

ScTP

Answer 5

Screened twisted-pair

Question 6

Two types of Coaxial cable

Answer 6

RG-6 limited to 152 m

RG-59 limited to 61 m

Question 7

What is the max length of horizontal cable?

Answer 7

90m

Question 8

What is the max length of patch cords or jumpers?

Answer 8

10m

Question 9

What is the difference between a code and a standard?

Answer 9

Code governs install practices and Standards are guidelines to install practices

Question 10

Three types of LAN cables

Answer 10

twisted pair, coaxial, fiber-optic

Question 11

Why is UTP cable twisted?

Answer 11

to shield against electromagnetic interference between wires. the twisting cancels each other out

Question 12

what is the pulling tension of Cat 5 horizontal distribution cable?

Answer 12

25 lbs

Question 13

Describe Wire Mapping

Answer 13

this test confirms whether or not there is proper connection of all four pairs of UTP cabling

Question 14

Describe Attenuation test

Answer 14

is a measure of the signal loss from one end of the link to the other. Is expressed in dB: the lower the number the better

Question 15

Describe Crosstalk

Answer 15

the unplanned transfer of information from one cct to another cct

Question 16

what does FEXT mean

Answer 16

Far-end crosstalk

Question 17

what does NEXT mean

Answer 17

near-end crosstalk

Question 18

what does ANEXT

Answer 18

alien crosstalk

Question 19

Return Loss

Answer 19

a ratio in dB of the outgoing signal’s power compared to the power of the signal reflected back

Question 20

ACR attenuation to crosstalk ratio

Answer 20

measure of how much more signal than noise exists in the link

Question 21

Decibel

Answer 21

the bel is a measure of analogue signal strength

Question 22

Noise

Answer 22

an unwanted electrical activity that interferes with the desired signal transmission

Question 23

basic link

Answer 23

permanent portion of the cable from the patch panel to the work-area outlet

Question 24

two possible causes of attenuation

Answer 24

high temp, too long cable

Question 25

List three actions that can reduce noise

Answer 25

maintain cable separation
no split pairs
maintain cable twisting

Question 26

Four components of a fibre-optic installation

Answer 26

transmitter
fibre-optic cable
optical connectors
receiver

Question 27

VIsible light is from

Answer 27

380 to 760 nm

Question 28

Advantages of fibre-optic

Answer 28

Wide bandwidth
Low loss
Electro-magnetic immunity
Light weight
Small size
More safe

Question 29

List the parts of a fibre-optic cable

Answer 29

core
cladding
primary coating
buffer
strength members
outer jacket

Question 30

CEC list what three types of fibre-optic cables?

Answer 30

nonconductive
conductive
hybrid

Question 31

What type of light is used in fibre-optic cable

Answer 31

infared light

Question 32

As the Hz of a waveform increases its wavelength

Answer 32

decreases

Question 33

List five purposes of security systems

Answer 33

Deterrence
Prevention
Detection
Response
Apprehension

Question 34

onion skin principle

Answer 34

provides layers of protection

Question 35

List the three layers of protection

Answer 35

Perimeter
Space
Spot

Question 36

The three main cct in a basic alarm system

Answer 36

Detection
Control
Output

Question 37

What does a PIR detector detect

Answer 37

changes in the levels of infrared energy