What are the types of cable?

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What is a Cable?
-Cable is an an insulated wire or wires having a protective casing and used for transmitting electricity or telecommunication signals.


A. Twisted Pair Cable 

 -type of cable that consists of two independently insulated wires twisted around one another. The use of two wires twisted together helps to reduce crosstalk and electromagnetic induction. While twisted-pair cable is used by older telephone networks and is the least expensive type of local-area network (LAN)cable, most networks contain some twisted-pair cabling at some point along the network. Other types of cables used for LANs include coaxial cablesand fiber opticcables.

STP (Shielded Twisted Pair)

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.








UTP (Unshielded Twisted Pair)

cable is a 100 ohm copper cable that consists of 2 to 1800 unshielded twisted pairs surrounded by an outer jacket. They have no metallic shield. This makes the cable small in diameter but unprotected against electrical interference.





B. Coaxial Cable

 is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer sheath or jacket. The term coaxial comes from the inner conductor and the outer shield sharing a geometric axis. Coaxial cable was invented by English engineer and mathematician Oliver Heaviside, who patented the design in 1880. Coaxial cable differs from other shielded cables because the dimensions of the cable are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line.


C.Fiber Optic Cable

also known as a fiber optic cable, is an assembly similar to an electrical cable, but containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed. Different types of cable[ are used for different applications, for example long distance telecommunication, or providing a high-speed data connection between different parts of a building.


What is the difference between straight cable and cross cable?


Straight-through Ethernet cables are the most commonly used. Crossover cablesuse two different wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wiring standard. ... For example, a computer with Auto MDI-X can use either a straight-through or crossover cable for any application.





















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