Transmission Medium
Coaxial cable
- hollow outer cylindrical conductor surrounding a single inner wire
- regularly spaced insulating dielectric hold inner conductor in place
- jacket or shield covers the outer conductor
- diameter 0.4 to 1 inch
- television distribution: CATV
- long distance telephone transmission
- short run computer I/O channels
- LANs
- better frequency characteristics, higher data rates, and more immune to interference than twisted pair