digital communication

What is the primary role of the military?

• A) To entertain people

• B) To defend a country and maintain security

• C) To control businesses

• D) To increase taxes

Which of the following is NOT a reason why the military is important?

• A) National Security
  

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  B) Disaster Relief
  

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  C) Selling products
  

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  D) International Peacekeeping

Which country’s military includes the Space Force?

• A) China
  

• 
  B) Russia
  

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  C) United States
  

• 
  D) India

What is the main purpose of satellite communication?

• A) To provide internet access in cities
  

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  B) To help people in remote areas communicate
  

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  C) To track weather changes
  

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  D) To improve television signals

How do satellite phones work?

• A) They connect directly to mobile towers
  

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  B) They send signals to satellites, which then transmit them back to Earth
  

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  C) They require Wi-Fi to function
  

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  D) They use underground cables for communication

In which of the following situations would satellite communication be most useful?

• A) A crowded city with many mobile towers
  

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  B) A disaster-stricken area where phone networks are down
  

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  C) A shopping mall with free Wi-Fi
  

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  D) A school with a computer lab

What affects the quality of reception in analogue television and radio broadcast communication?

• 
  

  The type of antenna used.

• 
  

  The strength of the signal and the positioning of the antenna.

• The distance between the transmitter and receiver.

• The type of content being broadcast

What is a characteristic of broadcast communication?

What is a characteristic of broadcast communication?

• It allows for direct interaction between the sender and receivers.

• It involves the transmission of information from a single source to many receivers simultaneously.

• It only delivers live content

• It is a two-way communication method that requires feedback from the receivers

What is one advantage of Digital Audio Broadcasting (DAB) over traditional analog radio?

• It uses analog signals for better sound quality

• It transmits audio along with additional data like song titles and artist names.

• It only offers a limited range of channels

• It does not require a receiver to decode the signals.

Which of the following is a drawback of satellite communication?

• It requires a constant power supply to function.

• Satellite signals can be affected by weather conditions such as snow or heavy rainfall

• Satellite signals can pass through solid objects like tall buildings.

• Satellite communication is unavailable when there are multiple satellites in use