Exam 5: Physical Layer Propagation

In Ethernet,limiting UTP cord runs to 100 meters normally limits ________ to an acceptable level.

The physical layer ________.

When the light energies of multiple pulses overlap,this is ________.

Single mode fiber distance is limited primarily by ________.

A typical optical fiber core size is ________.

Which of the following has a single connector type?

What type of line connects switches to other switches?

In the UTP wiring used in LANs,how many wires are there in a cord?

Untwisting wire pairs no more than 1.25 cm (a half inch)at their ends completely eliminates terminal crosstalk interference.

Which of the following is relatively immune to small errors?

LANs normally use ________.

Low-speed leased lines use ________ transmission lines.

Twisting wires reduces ________.

In optical fiber,we measure light in terms of ________.

In LANs,optical fiber typically is used in ________.

Analog signaling is relatively immune to small errors.

Which transmission medium is dominant for the wired access line between a host and the switch that serves the host?

The residential local loop consists of ________ transmission lines.

For full-duplex transmission,optical fiber normally uses ________.

Noise errors become severe before the signal attenuates to the level of the noise floor.