What Is Coaxial Cable?
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Coaxial cable is a type of cable used in TV, internet, and radio transmission. It consists of two concentric metal cylinders, the inner one being a conductor made of copper or aluminum and the outer one being a shield made of braided metal wires or other metal shielding. The space between the two layers is filled with insulation. Coaxial cable is highly resistant to interference and is usually used for digital signals such as HDTV or internet data.