USI Chapter 3 Review for Exam

Front

What is the difference between directional antennas and omni antennas in terms of range?

Back

Directional antennas have a longer range than omni antennas.

Front

What does SNR stand for?

Back

SNR means signal relative to ambient noise.

Front

What are the typical hardware components of a data link?

Back

Antenna, Receiver, and Transmitter.

Front

In what direction do omni-directional antennas transmit and receive data?

Back

Omni-directional antennas transmit and receive data continuously in a 360 degree direction.

Front

What is a highly effective method to safeguard data links from unauthorized interception?

Back

Encryption.

Front

What is the primary function of a transmitter in a data link?

Back

The primary function of a transmitter is to send data signals.

Front

How does a receiver function in a data link?

Back

A receiver captures and decodes the signals sent by the transmitter.

Front

What is the significance of using directional antennas in communication?

Back

Directional antennas focus energy in a specific direction, improving range and signal quality.

Front

What role does encryption play in data security?

Back

Encryption protects data by converting it into a format that is unreadable without a decryption key.

Front

What is the impact of ambient noise on signal quality?

Back

Ambient noise can reduce the signal-to-noise ratio (SNR), affecting the clarity and reliability of the communication.