Network Cables

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NETWORK MATERIALS, TOOLS

AND DEVICES

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1.) identify necessary network materials in accordance
with established procedures and check against system

requirements

2.) obtain tools, equipment and testing devices in

accordance with established procedures.

COMPETENCY

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UNLOCKING OF WORDS

• the noise generated by adjacent pairs of

wires in the cable

ARSCLSTOK

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UNLOCKING OF WORDS

• loss of quality of an electronic signal

DGRTIADAONE

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UNLOCKING OF WORDS

• the

combination

of

two

or

more

electromagnetic waveforms to form a
resultant wave in which the displacement is
either reinforced or canceled.

IERFNTENCERE

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UNLOCKING OF WORDS

RFI -Radio Frequency Interference
EMI - Electromagnetic Interface

- a disturbance generated by an external source that affects an
electrical circuit by electromagnetic induction, electrostatic
coupling, or conduction.
The disturbance may degrade the performance of the circuit or
even stop it from functioning.

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UNLOCKING OF WORDS

BNC - British Naval Connectors
or “Bayonet Neill-Concelman”

“connectors”
at the ends of the cables to make the connection

1

2

3

4

01
Unshielded twisted pair (UTP) is the cable that
has two or four pairs of wires. This type of cable
relies solely on the cancellation effect
produced by the twisted-wire pairs that limits
signal degradation caused by electromagnetic
interface (EMI) and radio frequency
interference (RFI).

02

Shielded Twisted pair (STP), each pair of wire is
wrapped in metallic foil to better shield the wires
from noise. Four pairs of wires are then wrapped in

an overall metallic braid or foil. STP reduces
electrical noise from within the cable. It also
reduces EMI and RFI from outside the cable.

Category rating

1.The number of wires in

the cable

2. The number of twists in

those wires

03
Coaxial cable Is a copper-cored cable

surrounded by a heavy shielding. Coaxial cable
is used to connect the computers to the rest of

the network.

Several types of coaxial cable exist:

• Thicknet (10BASE5) is a coaxial cable used in networks operating
at 10 Mbps, with a maximum length of 500 meters.
• Thinnet (10BASE2) is a coaxial cable used in networks operating at
10 Mbps, with a maximum length of 185 meters.
• RG-59 is most commonly used for cable television in the U.S.
•RG-6 is higher-quality cable than RG-59, with more bandwidth and
less susceptibility to interference.

04
Fiber-optic cable An optical fiber is a glass or
plastic conductor that transmits information
using light. Fiber optic cable has one or more
optical fibers enclosed in a sheath or jacket.

These are the two types of glass fiber-optic cable:

• Multimode is the cable that has a thicker core than single-mode cable.
It is easier to make, can use simpler light sources such as Light Emitting
Diodes (LEDs), and works well over distances of a few kilometers or less.

• Single-mode is the cable that has a very thin core. It is harder to make,

uses lasers as a light source, and can transmit signals dozens of

kilometers with ease.