CABLING

Cable is a medium through which information usually moves from one network devices to another. There are several types of cable which are commanly used with LAN's and each of them have different characteristics.





Twisted-pair cable
It comes in two forms which is shielded and unshielded cable. As we know, there are two category of transmission media which is bounded and unbounded media and twisted-pair cable is on the bounded categories same goes to coxial cable and fibre-optic cable.






Bounded
Current : UTP, STP and Coxial Cable
Light : Fibre-optic Cable

1.  Unshielded Twisted-Pair Cable (UTP)

~ suitable for transmitting both data and voice.

~ consists of two conductors (usually copper).

~ help to eliminate and reduce the impact of noise.

~ cheap, flexible and easy to install.

~ connector : RJ-45 connector. 

2.  Shielded Twisted-Pair Cable (STP)
~ wrapped in a foiled shielding.
~ help provide more reliable datacommunication.
~ prevents and eliminate crosstalk.
~ networj using Token Ring.
~ more expensive. 

3.   Fibre Optic Cable  
~ consist of center glass core
~ surrounded by several protective materials.
~ transmit signals over much longer distance.
~carry information at vastly greater speeds.

3.    Co-axial Cable

~ has a single copper at its centre.

~ carries signal of higher frequency.

~ metal shield help to block outside interferences.

(fluorescent light, motors and others)