Wireless medium

Which wireless medium uses visible light to transmit data and is commonly used in remote controls?

• Bluetooth

• Wi-Fi

• Infrared

• NFC (Near Field Communication)

Which type of wireless network uses transmitters to provide coverage across a large urban area?

• Wireless wide-area network

• Wireless metropolitan-area network

• Wireless local-area network

• Wireless personal-area network

Which wireless network mode uses wired connections to each access point?

• Ad hoc

• Hotspot

• Infrastructure

• Mixed mode

What is the purpose of encryption in wireless communication?

• To increase the range of the wireless signal

• To reduce the speed of data transmission

• To protect data from unauthorized access

• To make the signal more resistant to interference

Which wireless medium can transmit data over long distances and is commonly used for television broadcasting?

• Wi-Fi

• Infrared

• Satellite

• NFC (Near Field Communication)

What does "interference" mean in wireless communication?

• When the signal travels too far

• A strong wireless signal

• Unwanted signals disrupting communication

• Data traveling in the wrong direction

Which wireless medium is commonly used for short-range communication between devices like smartphones and headphones?

• Bluetooth

• Wi-Fi

• Satellite

• Fiber optics

Which of the following is a limitation of wireless communication?

• Higher data rates than wired communication

• Limited range and coverage

• Immunity to interference

• More expensive than wired communication

What is the main advantage of using a wireless communication medium?

• Faster data transmission

• More secure connections

• No need for physical cables

• Cheaper than wired communication

What is a "wireless spectrum" in communication?

• The range of colors used in wireless devices

• A technology for charging devices without wires

• The range of frequencies used for wireless communication

• A type of wireless encryption method