Media for Internet
Media for Internet Transmission Media The transmission medium is the physical path by which a message travels from sender to receiver. Classes of transmission media Guided Media Guided media, which are those that provide a conduit/ medium from one device to another. There are three categories of guided media: Twisted-pair cable Coaxial cable Fiber-optic cable Twisted-pair cable Twisted pair consists of two conductors (normally copper), each with its own plastic insulation, twisted together. The twisting helps to reduce the interference (noise) and crosstalk Twisted-pair cable comes in two forms: unshielded (UTP) and shielded (STP) Coaxial cable carries signals of higher frequency ranges than twisted-pair cable. Metal cables transmit signals in the form of electric current. Optical fiber is made of glass and transmits signals in the form of light . Optical fibers use reflect...