2007-08-07 04:53:40 · 2 answers · asked by nobody 1 in Computers & Internet ➔ Hardware ➔ Add-ons
with 802.11a/b/g?
2007-08-07 04:57:45 · update #1
are you sure about it? companies dont make any gimic's out of it?
2007-08-07 05:04:02 · update #2
Yes, Wifi-N uses the same 2.4Ghz frequency bands that Wifi-b/g do...
Wifi-a uses 5Ghz so it's not compatible with b/g/n, some PCI/PCMCIA cards will be wifi-a/b/g compatible meaning they are basically 2 cards in 1 housing...
The reason wifi-N is different, is because it has the ability to use what's called "wideband" - instead of using a 22Mhz wide signal (for example ch 1 uses 2401Mhz-2423, ch2 2 uses 2406-2428Mhz, and so on...) Wifi-N starts at ch 3 and is 40 Mhz wide instead of 22...
This allows more data to be transmitted across more "paths" simutaniously :))
It's kind of hard to understand the concept at first, I'm in school for RF Engineering so I could go on and on about it, but don't want to confuse anyone too bad. If you've got any questions feel free to add - I'll check back!
BTW, to sum up what you asked, YES Wifi-N is backward compatible with B/G, however A is on a different frequency.
Hope this helps!
Update:
Yes, I'm 100% positive! Wifi-N is no gimmick if you get the right one in Draft 2.0 you'll be able to stream multiple HD signals throughout your house if you want!! You can get up to 400Mbps vs 54(a/g), not to mention I can take my laptop all the way down the street about a block away now with a standard g card!! Before I had a G router and I could only go downstairs before I'd lose signal...
When purchasing a router though, make sure you get either a Netgear or Linksys - Belkin, D-Link, Buffalo, etc are a little shady and don't give quite as good of range or speed... Linksys was recently bought by Cisco and their products have really stood out!! I personally have the WRT330N and LOVE IT!! I've installed nearly 35-40 of them now and not a single complaint yet!!
See, the FCC has regulated how many watts/mw a device can transmit, and using DSSS (direct sequence spread spectrum) they can only transmit a small amount of power (100mw-125mw), so they use DSSS which broadcasts on 22 bands each carrying different parts of the data - Wifi-N uses 40 channels and the same output power!
You have to have an N router and an N card to utilize the speeds though...
2007-08-07 05:51:05 · answer #1 · answered by Anonymous 2 · 0⤊ 0⤋
no but 802.11n normally comes with 802.11b & g in the wifi card.
2007-08-07 05:01:59 · answer #2 · answered by Jake 7 · 0⤊ 1⤋