What does PCM primarily do in digital communication?

• Changes the shape of an antenna

• Converts analog signals to digital signals

• Translates digital signals to Morse code

• Increases signal noise

Why is it important to sample a signal at a high enough rate in PCM?

• To make it louder

• To avoid signal distortion

• To make it colorful

• To convert it into text

What common device uses PCM for audio recording?

• Mobile phone

• Microwave oven

• Bicycle computer

• Flashlight

What determines the quality of a PCM signal?

• Signal strength

• Sampling rate

• Length of the cable

• Color of the signal

What is an advantage of digital transmission over analog?

• It is less affected by noise

• It uses more power

• It's only for video signals

• It's slower

Why is synchronization important in digital communication?

• To save battery life

• To ensure data arrives correctly

• To make the signal brighter

• To improve sound quality

Which of the following is an example of digital transmission?

• A conversation over a walkie-talkie

• Watching a movie on a DVD

• Listening to an old radio broadcast

• Reading a book

What is the purpose of a protocol in digital communication?

• To control traffic lights

• To standardize how devices communicate

• To store extra data

• To limit internet usage

Which protocol is responsible for routing data on the internet?

• FTP

• IP

• HTTP

• SMTP

What does TCP do in the TCP/IP model?

• Handles data encryption

• Ensures reliable data delivery

• Tracks the user's location

• Converts text to binary