DEFINITION OF TRANSMISSION MEDIA
Transmission media refers to any form of media that is primarily used for the transfer of signals. The media may be a wire, coaxial cable, fiber optics, air or even a vacuum through which the signal is transferred from one point to another.
Describes the type of physical system used to carry a communication signal from one system to another. Examples of transmission media includetwisted-pair cable, coaxial
cable, and fiber optic cable.
Types of Transmission Media
Transmission media is broadly classified into two groups.
1. Wired or Guided Media or Bound Transmission Media
2. Wireless or Unguided Media or Unbound Transmission Media
Wired or Guided Media or Bound Transmission Media:
Bound transmission media are the cables that are tangible or have physical existence and are limited by the physical geography. Popular bound transmission media in use are twisted pair cable, co-axial cable and fiber optical cable. Each of them has its own characteristics like transmission speed, effect of noise, physical appearance, cost etc.
Wireless or Unguided Media or Unbound Transmission Media:
Unbound transmission media are the ways of transmitting data without using any cables. These media are not bounded by physical geography. This type of transmission is called Wireless communication. Nowadays wireless communication is becoming popular. Wireless LANs are being installed in office and college campuses. This transmission uses Microwave, Radio wave, Infra red are some of popular unbound transmission media.
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