Sunday 6 May 2012

Telecommunication and Networking lesson 5

:) Hi everyone I am here again let's look for our topic :) 


Cabling :) 


everyday we use cable for connect to internet with our desktop or laptop. cables carry information from one network device to another . there are four types of cable ;

  • Unshielded Twiested Pair (UTP) 
  • Shielded Twisted Pair (STP) 
  • Coaxial Cable
  • Fiber Optic Cable

UTP and STP 


UTP is comes from two forms : unshielded and shielded. 
it transmitting data and voice . inside of  each twisted cable consist 
an solid copper conductors and outside covered with a PVC. 
this two wires are twisted around each other at regular intervals. 
Advantages UTP id cheap, flexible and easy to install.
electronic industries are produce 1 unshielded to 5 unshielded 
also UTP ha maximum segment length of 100 meters.

STP is shielded twisted pair cable. it has only one 
differences from UTP ,it has metal foil covering for each pair. 
it prevents electromagnetic noise and STP uses the same connectors as UTP, but the shield must be connected to a ground. 
STP more expensive then UTP but less susceptible to noise. 

COAXIAL CABLE 


Coax carries signals of higher frequency ranges than twisted-pair cable. 
from inside to outside it has inner conductor,insulator,outer conductor, 
insulator and plastic cover. the metal shield conserve the signals from outside effects.

OPTICAL FIBER 




Optical fiber transmit signals in the form of light and it consists glass core inside 
and it is transmits light rather than others.
also it is able to transmits data for long distance than coaxial and twisted pairs.  

10BaseT : Unshielded Twisted Pair : 100 meters
10Base2 : Thin Coaxial : 185 meters
10Base5 : Thick Coaxial : 500 meterS
10BaseF : Fiber Optic : 2000 meters



I hope this video will help more to understand better :) 






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