Cable that is composed of conducting wire core insulated in the center of another cylindrical conducting shield.

Cable that is composed of conducting wire core insulated in the center of another cylindrical conducting shield.

• A. Stand-alone switch
• B. Alternate routing
• C. Coaxial Cable
• D. 911 Direct Trunking

Answer: (C)

Coaxial cable is defined by a central conducting wire core that is insulated and sits inside a cylindrical conducting shield. This arrangement—with an inner conductor, dielectric insulation around it, and an outer shield—provides strong shielding from external interference and maintains a consistent impedance for signal transmission, which is why it’s widely used for RF and telecom applications. The description in the question matches this structure exactly: a wire core insulated within a surrounding cylindrical shield. The other options describe equipment or routing concepts rather than a cable’s physical construction, so they don’t fit the description of a cable made with a central conductor and an outer shield.

Coaxial cable is defined by a central conducting wire core that is insulated and sits inside a cylindrical conducting shield. This arrangement—with an inner conductor, dielectric insulation around it, and an outer shield—provides strong shielding from external interference and maintains a consistent impedance for signal transmission, which is why it’s widely used for RF and telecom applications. The description in the question matches this structure exactly: a wire core insulated within a surrounding cylindrical shield.

The other options describe equipment or routing concepts rather than a cable’s physical construction, so they don’t fit the description of a cable made with a central conductor and an outer shield.