The sight line

Which of these technologies is commonly used for printing and uses a direct line of sight for communication?

A) Infrared

B) Bluetooth

C) 802.11

D) Mobile Broadband

E) Wireless would be much easier to understand if you could plug it in

The answer: A) Infrared

Infrared was an early wireless network type that was very common in portable devices, but the line of sight limitations and lack of hardware support made it hard to gain much ground. Once 802.11 networks became popular, IrDA became a less popular option.

Want to know more? Watch “Laptop Communications.”

Today’s laptops employ many communications methods that use many different technologies. In this video, you’ll learn about Bluetooth, infrared, mobile broadband, Ethernet, and modems.