CamTechs Data Transmission

What is a key requirement for devices that use infrared and laser transmission to communicate?

• They require a power source.

• They require line of sight.

• They require a long range.

• They require a high bandwidth.

Answer explanation

Devices using infrared and laser transmission require line of sight because these signals travel in straight lines and cannot penetrate obstacles. This makes direct visibility essential for effective communication.

Which of the following is a common use for laser infrared communication?

• Mobile phone calls

• TV remotes

• Internet browsing

• Satellite communication

Answer explanation

TV remotes commonly use laser infrared communication to transmit signals to the television. This technology allows for wireless control, making it a practical application of infrared communication.

What is a major limitation of infrared and laser transmission devices?

• They are very expensive.

• They have a short battery life.

• They can be blocked and reflected by many objects.

• They require a lot of maintenance.

Answer explanation

A major limitation of infrared and laser transmission devices is that they can be blocked and reflected by many objects, which can disrupt the signal and reduce effectiveness.

What type of transmission does Bluetooth technology use?

• Single-spectrum

• Mixed-spectrum

• Infrared

• Laser

Answer explanation

Bluetooth technology uses mixed-spectrum transmission, which combines different frequency bands to enhance communication reliability and reduce interference, unlike single-spectrum, infrared, or laser options.

Which of the following is NOT a typical use for Bluetooth technology?

• Wireless headphones

• Wireless keyboards

• TV remotes

• Wireless mice

Answer explanation

TV remotes typically use infrared or RF technology rather than Bluetooth, which is more commonly used for devices like wireless headphones, keyboards, and mice.

What is the range of Bluetooth technology typically like?

• Very long range

• Medium range

• Very short range

• Unlimited range

Answer explanation

Bluetooth technology typically has a very short range, usually around 10 meters (33 feet). This makes it suitable for connecting devices in close proximity, unlike other technologies that may offer longer ranges.

What does GSM stand for?

• Global System for Mobile communications

• General Satellite Module

• Global Satellite Messaging

• General System for Messaging

Answer explanation

GSM stands for Global System for Mobile communications, which is a standard developed to describe protocols for second generation (2G) digital cellular networks used by mobile phones.

Which of the following is a characteristic of Bluetooth technology?

• Requires line of sight

• Does not require line of sight

• Only works outdoors

• Only works with infrared devices

Answer explanation

Bluetooth technology does not require line of sight to connect devices, allowing for communication through walls and obstacles. This makes it versatile for both indoor and outdoor use.

What is the primary use of GSM technology?

• Transferring data across the cellular mobile network

• Connecting wireless peripherals

• Remote control of devices

• Satellite communication

Answer explanation

GSM technology is primarily used for transferring data across the cellular mobile network, enabling voice calls and SMS services. The other options do not represent the main function of GSM.

Which of the following devices is most likely to use infrared communication?

• Wireless mouse

• Mobile phone

• TV remote

• Laptop

Answer explanation

The TV remote is most likely to use infrared communication, as it sends signals to the TV using infrared light. In contrast, devices like wireless mice and mobile phones typically use other forms of wireless communication.