<P> An Ethernet crossover cable is a type of twisted pair Ethernet cable used to connect computing devices together directly that would normally be connected via a network switch, Ethernet hub or router, such as directly connecting two personal computers via their network adapters . Most current Ethernet devices support Auto MDI - X, so it doesn't matter whether you use crossover or straight cables . </P> <P> An optical fiber cable consists of a center glass core surrounded by several layers of protective material . The outer insulating jacket is made of Teflon or PVC to prevent interference . Optical fiber deployment is more expensive than copper but offers higher bandwidth and can cover longer distances . </P> <P> There are two major types of optical fiber cables: short - range multi-mode fiber and long - range single - mode fiber . </P> <P> Coaxial cables confine the electromagnetic wave inside the cable, between the center conductor and the shield . The transmission of energy in the line occurs totally through the dielectric inside the cable between the conductors . Coaxial lines can therefore be bent and twisted (subject to limits) without negative effects, and they can be strapped to conductive supports without inducing unwanted currents in them . </P>

What is the connector which is used for internet