CELTIC

Media Transmission of Data

Media transmission devide two kinds.they are media cable and media nircable.Media cable is a media to build computare network of LAN.This media choose usage of cable media. The cable which used are twisted paie and coaxial. The transmission data speed is 10-100 mega byte per second. The shape of twisted pair cable is same with telephone cable. There are two kinds shape of twisted pair cable. They are shielded twisted pair to has wrapper and unshielded twisted pair which doesn't has wrapper. The function of wrapper is reduce grounding disturbance ang interferensu wave from out side. The shape of coaxial cable is same with the television cable . The kinds of coaxial cable are TV cable,thick coax cable,thin coax, and arcnet.Third is fober optic cable. This cable is to countain fiber thin of mirror and in the middle has core at was place to pass the light.The kinds of fiber optic cable are singkmode to usage laser and multimode to usage LED(light limiting diode).

Media nircable is media which doesn't use cable. The function of this media is build a network computare of LAN for network communication LAN long distance but media nircable seldom used because the expenses is expensive.