________ cables are composed of a glass or plastic inner core surrounded by cladding, all encased in an outside jacket.
A、Twisted-pair;
B、Coaxial;
C、None of these;
D、Fiber-optic
发布时间:2026-01-25 06:40:08
A、Twisted-pair;
B、Coaxial;
C、None of these;
D、Fiber-optic