WHAT ARE THE TYPES OF CABLE?

A.TWISTED PAIR

is the ordinary copper wire that connects home and many business computers to the telephone company. To reduce crosstalk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other.

       a.STP

is similar to UTP but with each pair covered by an additional copper braid jacket or foil wrapping. This shielding helps protect the signals on the cables from external interference.

     b.UTP
Short for , unshielded twisted pair a popular type of cable that consists of two unshielded wires twisted around each other. Due to its low cost, UTP cabling is used extensively for local-area networks (LANs) and telephone connections.

B.COAXIAL
Coaxial cabling has a single copper conductor at its center. A plastic layer provides insulation between the center conductor and a braided metal shield (See fig. 3). The metal shield helps to block any outside interference from fluorescent lights, motors, and other computers.

C.FIBER OPTIC 

consists of a center glass core surrounded by several layers of protective materials (See fig. 5). It transmits light rather than electronic signals eliminating the problem of electrical interference. This makes it ideal for certain environments that contain a large amount of electrical interference. It has also made it the standard for connecting networks between buildings, due to its immunity to the effects of moisture and lighting.

Explain the difference between straight-through cable and cross-over cable.

STRAIGHT-THROUGH CABLE

A straight through cable is a type of twisted pair cable that is used in local area networks to connect a computer to a network hub such as a router.

CROSS-OVER CABLE

An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly.

SOURCE:https://fcit.usf.edu/network/chap4/chap4.htm