What is Transmission medium?
[[File:Transmission line towers and high tension lines 1a35251v.jpg|thumb|right|250px|{{Center|High tension lines that transmit electricity}}]] A '''transmission medium''' is something ([[solid]], [[liquid]], [[gas]], or [[plasma (physics)|plasma]]) that can [[wikt:transmit|transmit]] [[energy]]. For example, the transmission medium for [[sound]]s is usually air. But sound can also be transmitted through solids and liquids. A [[wire]] can transmit [[electron]]s in the form of [[electricity]]. There are [[wikt:advantage|advantage]]s and [[wikt:disadvantage|disadvantage]]s to every transmission medium.<ref>Gilbert Held, ''Ethernet Networks: Design, Implementation, Operation, Management'' (London; New York: Wiley, 2003), p. 22</ref> These can be things such as [[Price|cost]], [[Bandwidth (signal processing)|bandwidth]] (or how much of something can be transmitted), the [[speed]] of the transmission and [[wikt:scope|scope]]. == Telecommunications == [[File:Twisted pair.svg|thumb|left|160px|{{Center|Twisted pair cable}}]] Physical mediums: are actually [[wire]]s or [[cable]]s used to connect two or more [[wikt:device|device]]s. These can be [[twisted pair]], [[Coaxial cable|coaxial]] and [[fiber optic]] cables. Twisted pair cables were [[wikt:tradition|tradition]]ally used in [[telephone]] wire lines and cables. But they are still widely used in [[network]]s and other uses. They are called ''twisted pair'' cables because they have many small thin insulated wires twisted around each other in a [[balanced circuit]]. Twisted pair cables can contain up to 4200 pairs of wires.<ref>Tamara Dean, ''Network+ Guide to Networks'' (Cambridge, MA: Course Technology, Thomson Learning, 2000), p 100</ref> == Related pages == * [[Luminiferous aether]] == References == {{reflist}} [[Category:Physics]] [[Category:Energy in transport]]