- Uses infrared light to transmit data between devices.
- Requires a clear line of sight between the devices.
- Has a short range (up to 3 feet).
- Commonly used for remote controls, wireless keyboards and mice, and some printers.
2. Radio frequency (RF)
- Uses radio waves to transmit data between devices.
- Does not require a clear line of sight between the devices.
- Has a longer range than infrared (up to hundreds of feet).
- Commonly used for Wi-Fi, Bluetooth, and cellular networks.