CABLING...

Is a medium through which information usually moves from one network device to another.

TYPES OF CABLES

*use current

        - Unshielded Twisted Pair (UTP) cable

        - Shielded Twisted Pair (STP) cable

*use light

        - Co-axial cable

        - Fiber Optic cable

        - Wireless cable

UNSHIELDED TWISTED PAIR (UTP) CABLE

-has 4 pairs of wires inside jacket

-each pair is twisted with different number of twists per inch

-to help eliminate interference from adjacent pairs (nearest disruption) & others electrical devices.

-UTP’s categories:

TYPES	USE	EXAMPLE
Category 1	Voice	Telephone wire
Category 2	Data to 4 Mbps	Local talk
Category 3	Data to 10 Mbps	Ethernet
Category 4	Data to 20 Mbps	16 Mbps token ring
Category 5	Data to 100 Mbps	Fast ethernet

# category 3 & 4 usually use in school.

-Standard connecter : RJ-45 connecter (Registered Jack)

-Disadvantages : it may be susceptible to radio & electrical frequency        interference.

SHIELDED TWISTED PAIR (STP) CABLE

-consist of two individual wires wrapped in a foil shielding

-to help provide a more reliable (no disruption/accurate) communication

-suitable for environments with electrical interference

-extra shielding can make cables quite bulking

-often used on networks using Token Ring topology

CO-AXIAL CABLE

-has a single copper conductor at its center

-a plactic layer provides insulation between center conductor & a braided metal shield

-metal shield: helps to block any outside interference from fluorescent lights, motors, and other computers

-connecter: Bayone-Neill-Concelman (BNC) connector

-different types of adapters are available for BNC connectors, including a T-connector, barrel connector, and terminator.

FIBER OPTIC CABLE

-consists of a center glass core surrounded by several layers of protective materials

-it transmits light rather than electronic signals

-able to transmit signals over much longer distances than coaxial and twisted pair

Summary of Ethernet cabling.