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bluetooth and infrared  RSS feed

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Hey all.
what is the diff btw bluetooth technology and infrared ?
anyway, why its called bluetooth ?
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"Bluetooth" was the nickname of Harald Bl�tland II, king of Denmark from 940 to 981, who united all of Denmark and part of Norway under his rule.
This was the codename Intel came up with when the SIG was started in 1998
The codename was used internally and externally to describe the technology early on and Bluetooth SIG marketing group couldn�t come up with a better name that wasn�t already trademarked.

Infrared is fairly reliable and doesn't cost much to build into devices. It does have drawbacks:

- It's line-of-sight, so a sender must align with its receiver.
- It's one-to-one, so a device can't send to multiple receivers at the same time.

Infrared's advantages are consequences of its disadvantages:

- Because it's line-of-sight, interference is uncommon.
- Because it's one-to-one, message delivery is reliable: each message sent goes to the intended recipient no matter how many infrared receivers are in the room.

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