Fiber Optics – Light Brigade Practice Test 2026: All-in-One Resource for Exam Success!

Composite cable means a single cable that carries both fiber optic data and electrical conductors. This hybrid setup combines the high bandwidth of fiber with copper conductors for power or control signals, all in one jacket, which simplifies installation and enables devices to receive data and power through the same cable run.

That’s why the option with fiber and copper is best: it explicitly includes both media in one cable. Fiber and glass isn’t a typical way to describe a composite cable since glass is the material fiber is made from, not a separate conductors pair. Copper and aluminum lacks any fiber component, so it isn’t a fiber-based composite. A fiber-only cable has only one medium and isn’t composite.