Guided media

Which transmission media has the highest transmission speed in a network?

• coaxial cable

• twisted pair cable

• optical fiber

• electrical cable

Twisting in a twisted-pair help reduce the __________.

• length

• cost

• noise

• None of the choices are correct

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

• twisted-pair

• coaxial

• fiber-optic

• shielded twisted-pair

Bits can be send over guided and unguided media as analog signal by

• digital modulation

• amplitude modulation

• frequency modulation

• phase modulation

Which data communication method is used to transmit the data over a serial communication link?

• Simplex

• Half-duplex

• Full duplex

• All of above

In an optical fiber, the inner core is ______ the cladding.

• more dense than

• less dense than

• me density as

• another name for

If a satellite is in geosynchronous orbit, it completes one orbit in ______________

• one hour

• 24 hours

• one month

• one year

_________ are used for cellular phone, satellite, and wireless LAN communications.

• Radio waves

• Infrared waves

• Microwaves

• none of the above

________ are used for short-range communications such as those between a PC and a peripheral device.

• Radio waves

• Infrared waves

• Microwaves

• none of the above

25. Microwaves are _________.

• omnidirectional

• bidirectional

• unidirectional

• none of the above