more) extremely thin strands of glass. Glass cladding covers each strand, helping to keep
the light in the strand. Light is carried one way only on each strand because there is no
way to send light in two directions simultaneously on a single strand. The two core
strands carry light either u por down the cable run. A plastic outer jacket covers the cable.
Figure 20-7 shows the makeup of a fiber optic cable.
Chapter 20: Networks and Communications^519
Figure 20-5. An RJ-45 connector is used with twisted pair cablingFigure 20-6. The foil wrapper of shielded twisted pair (STP) cable