Exam 3: Physical Layer

Amplitude, frequency and phase are all characteristics of a sound wave.

Which of the following media has the lowest error rates and the highest transmission speeds?

With modem communications, the receiving modem converts the incoming digital signal from the telephone line into an analog signal that can be understood by the computer.

Equipment used to transform analog voice signals to digital signals and digital signals to analog signals.

Data compression can increase the throughput of a communication link.

If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz, the bandwidth available for this circuit is :

The earliest type of fiber optic systems were:

____________ is one of the most commonly used coding schemes used in data transmission.

Describe how data could be transmitted using amplitude modulation.

In a multipoint circuit configuration, each computer has a dedicated circuit between itself and each of the other computers in the network.

Describe the six subsystems of TIA/EIA 568-B.

A codec converts an incoming digital signal to an analog signal for transmission over an analog network.

Describe how data could be transmitted using frequency modulation.

___________ is commonly used to transmit phone conversations over digital networks.

Describe four types of radiated media.Give an example, describe what it looks like and how it works, and why it might be used in a scenario of a network.

Coaxial cable costs less and offers less shielding to electrical interference than twisted pair cable.

Newer telephone circuits, built during the last decade, offer higher quality because they were built using analog transmission.

One way to reduce quantizing errors is to increase the sampling rate of the analog signal.

Describe how data could be transmitted using a combination of modulation techniques.

Describe two ways in which Statistical Time Division Multiplexing STDM) differs from Time Division Multiplexing TDM).