Ch. 3: Fiber-Optic Communications

Which of the following communications systems typically uses fiber-optic backbones?

- CATV - Cell phones - Internet - Telephones Fiber is used for backbones for all these networks, including cellphone backbones, for its bandwidth/distance advantage, making it lower cost.

The bandwidth and distance capability of optical fiber means that ___.

- fewer cables are needed - fewer repeaters are needed - less maintenance is required - less power is consumed by the network

T/F Telephone networks have been converted to fiber, including long distance and metropolitan networks, but fiber to the home (FTTH) is not yet feasible.

False FTTH is cost effective today because of the demand for high-speed digital services in the home and the development of lower cost passive optical network (PON) networks.

Copper networks can be converted to fiber optics using ___.

Media converters Media converters convert copper to fiber or even MM to SM fiber

In an industrial environment, fiber is most often used to ___?

Prevent electromagnetic interference Electrical interference is a problem in many industrical applications and fiber's immunity to EMI is important.

Which of the following are NOT necessary in a centralized fiber-optic cabling architecture?

Repeaters or hubs

(T/F): The biggest advantage of optical fiber is the fact it is the most cost effective means of transporting information.

True Fiber can transport nore information longer distances in less tome than any other communcations medium.

(T/F): Fiber optics is used in cars to connect their electronic systems.

True Fiber networks are used in cars and planes for connecting their electronic because fiber is immune to noise and saves weight.