Exam 5: Physical Layer Propagation

In cable television,the two conductors ________.

Multimode fiber distance is limited primarily by ________.

For ADSL service,which of the following must be added to the telephone system?

In cable television,the drop cable runs from the trunk cable into the home.

In digital signaling there is (are)________ state(s).

A popular type of optical fiber connector is ________.

Optical fiber uses ________ signaling.(Give the most specific answer.)

In most versions of Ethernet,what is the maximum cord length allowed by the standard?

Which of the following already runs to nearly all customer premises?

As a signal propagates down a UTP cord,greater propagation distance will result in more noise errors,even if the noise level is constant.

In 4-pair UTP,what is twisted?

In television,the ________ carries signals past the subscriber's house.

What transmission medium do ALL DSL services use?

The Ethernet standard limits UTP propagation distances to 100 meters at all speeds up to 1 Gbps.

In ADSL,the residential customer needs ________.

The main benefit of parallel transmission over serial transmission is ________.

The noise floor is ________.

Which light wavelength propagates farthest in optical fiber?

In ADSL,the customer needs ________.

Modal bandwidth is a measure of ________.