Physical transmission
Twisted Pair Cable:-
consist of one/more twisted-pair wires bundled together. often use for network cabling & telephone systems.
Coaxial cable:-
consists of a single copper wire surrounded by three layers, an insulating material, a woven/braided metal & a plastic outer coating.
Wireless transmission
Infrared:-
medium that sends signals using infrared light waves.
Microwave:-
radio waves that provide a high-speed signal transmission.
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