Fiber optics is a technology that utilizes glass (or plastic) threads, known as fibers to transmit data. It uses total internal reflection to keep light rays trapped within the denser glass of the center of a composite cylindrical fiber, the core. It consists of numerous glass threads, each of which is capable of transmitting data modulated into light waves. They provide greater bandwidth to transmit data and are less susceptible to interference as found in other waveguides.

CompTIA A+ is an entry-level computer certification for IT service technicians. It is meant to certify the competency of entry level PC computer service professionals in maintaining, installing, operating, and customizing personal computers. The A+ certification is endorsed by the Computing Technology Industry Association (CompTIA).