Chapter 3

Transmission media are usually categorized as ...........

• Fixed or unfixed

• Guided or unguided

• Determinate or indeterminate

• metallic or nonmetallic

BNC connectors are used by ............... cables.

• UTP

• STP

• Coaxial

• Fiber-optic

Category 1 UTP cable is most often used in ................. networks.

• Fast Ethernet

• Traditional Ethernet

• Infrared

• Telephone

.............. cable consists of an inner copper core and a second conducting outer sheath.

• Twisted-pair

• Coaxial

• Fiber-optic

• Shielded twisted-pair

In fiber optics, the signal source is ................ waves.

• Light

• Radio

• Infrared

• Very low-frequency

Smoke signals are an example of communication through ...............

• A guided medium

• An unguided medium

• A refractive medium

• A small or large medium

Which of the following is not a guided medium?

• Twisted-pair cable

• Coaxial cable

• Fiber-optic cable

• Atmosphere

Which of the following primarily used guided media?

• Local telephone system

• Cellular telephone system

• Satellite communications

• Radio broadcasting

What is the major factor that makes coaxial cable less susceptible to noise than twisted-pair ?

• Inner conductor

• Diameter of cable

• Outer conductor

• Insulating material

The inner core of an optical fiber is ...........in composition.

• Glass or plastic

• Copper

• Bimetallic

• Liquid