These jeans don’t fit

Which of these is a disadvantage of IrDA?

A) Interference is common with devices such as cordless phones and microwave ovens

B) Requires a direct line of sight

C) Requires a wireless provider contract

D) Requires a specific category of network cabling

E) Requires a diet of protein and self-doubt

The answer: B) Requires a direct line of sight

Infrared was relatively common on printers and laptops, but the direct line-of-sight limitations and the popularity of 802.11 wireless networks has caused IrDA ports to disappear from most devices.

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.