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Windows 7 to Turn Your Wi-Fi Card Into Two

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4:30 PM - May 19, 2009 by Marcus Yam

Windows 7 will turn your single Wi-Fi card into two. Magic!

One of the things that we love most about Windows 7 right now is the much-improved taskbar. But as much as we love it, it’s not allowing us to do anything radically different than from before. Much of what we’ve reported about Windows 7 centers around small tweaks and changes that make us enjoy our computing experience more, but now we’ve learned about something that could change the way that we use our portable computers.

According to istartedsomething.com, Microsoft has been researching since 2002, a technology that would allow a wireless adaptor to appear as more than just the single piece of hardware that it is.

Windows 7 will allow through clever virtualization software a single Wi-Fi card to appear as two. For the way that most of us use Wi-Fi today, this doesn’t sound like a big deal – but with two ‘virtual’ adapters, now we can connect to two hotspots at once.

The revolutionary part comes in when you want to use one virtual Wi-Fi adapter to connect to a hotspot and the other one to share the connection with other laptops. This could be useful for paid connections at public places such as hotels. Only one paid-internet pass would be needed, which can then be shared through the second virtualized adapter. You could even take it a step further by using the second adapter as a repeater.

The feature is already integrated into Windows 7, but the reason why we’re not all running virtualized adapters now is because there needs to be specific drivers written to take advantage of the feature.

Microsoft’s documentation reads:

“On Windows 7 and later, the operating system installs a virtual device if a Hosted Network capable wireless adapter is present on the machine. This virtual device normally shows up in the “Network Connections Folder” as ‘Wireless Network Connection 2’ with a Device Name of ‘Microsoft Virtual WiFi Miniport adapter’ if the computer has a single wireless network adapter. This virtual device is used exclusively for performing software access point (SoftAP) connections [...]. The lifetime of this virtual device is tied to the physical wireless adapter. If the physical wireless adapter is disabled, this virtual device will be removed as well.”

Support for virtual wireless adapters is supposed to be part of the Windows 7 driver certification program, so hopefully we’ll be rocking dual Wi-Fi soon.

Source : Tom's Hardware US

Talkback
Add your comment
leafblower29 05/19/2009 10:51 PM
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Quote :but with two ‘virtual’ adapters, now we can connect to two hotspots at once.


Cool! I always wondered how that could be done.

hellwig 05/19/2009 11:00 PM
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Anonymous 05/19/2009 11:09 PM
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Zoonie 05/19/2009 11:13 PM
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I think this is great. Any useful feature is a good feature!

tenor77 05/19/2009 11:24 PM
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-4+

Wi-Fi Mitosis? Where's my tin foil hat?????

Awesome idea, but you've still got a bottleneck in data transfer rates. Still hard to knock. Don't like it, don't use it.

ses27 05/19/2009 11:30 PM
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didn't OLPC do this with there system
Computers chaining to each other to get to hot spot

Harby 05/19/2009 11:31 PM
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hellwig :
So you're saying this is pretty much only useful for cheating businesses out of money by stealing internet access for your friends? How many people in your hotel room need to access the internet at one time anyway? And if you're on a business trip, shouldn't your employer cover the cost of internet access if its necessary for business. And what hotels are you staying at that charge you for internet access? Airports, truckstops, etc... might be another matter, but hotels?Ah, now there's a good, law-abiding use. Rather than wire a WAP to another part of your house (why are Linksys WAPs more expensive than their routers?), use the computer that sits inbetween, assuming its on all the time.



Take a chill pill, are you a hotel owner or something?

kelfen 05/19/2009 11:46 PM
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hellwig :
So you're saying this is pretty much only useful for cheating businesses out of money by stealing internet access for your friends? How many people in your hotel room need to access the internet at one time anyway? And if you're on a business trip, shouldn't your employer cover the cost of internet access if its necessary for business. And what hotels are you staying at that charge you for internet access? Airports, truckstops, etc... might be another matter, but hotels?Ah, now there's a good, law-abiding use. Rather than wire a WAP to another part of your house (why are Linksys WAPs more expensive than their routers?), use the computer that sits inbetween, assuming its on all the time.


theres something called security you should look it up; aka password on wireless connection

pharge 05/20/2009 12:25 PM
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I wish I can have 2 physical WiFi cards (G/N)on my laptop and double my WiFi speed...lol

Guess that will never happen...>_

wkcar 05/20/2009 12:55 PM
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So theoretically, if I'm connected to a network that limits bandwidth to like 1.5 MBit/s per connection, can I create a virtualized card to connect to that same network to have twice the speed to download files/surf the net? or is this just limited to using the network and creating ad-hoc connections at the same time?

Anonymous 05/20/2009 1:06 AM
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FINALLY!! I have been trying to figure out how this very concept could be implemented! I am looking forward to using win7 even more now. With my A/B/G/N wireless adapter I should in theory have more control over the wireless radios to use for surveys and other such tasks.
On a more darker note... now I can properly deploy my 'Leech-Box' at the apartment complex. 50mb down ftw! XD

twisted politiks 05/20/2009 1:43 AM
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-1+

hellwig :
So you're saying this is pretty much only useful for cheating businesses out of money by stealing internet access for your friends? How many people in your hotel room need to access the internet at one time anyway? And if you're on a business trip, shouldn't your employer cover the cost of internet access if its necessary for business. And what hotels are you staying at that charge you for internet access? Airports, truckstops, etc... might be another matter, but hotels?Ah, now there's a good, law-abiding use. Rather than wire a WAP to another part of your house (why are Linksys WAPs more expensive than their routers?), use the computer that sits inbetween, assuming its on all the time.




almost all decent hotels charge for internet nowadays, because they know people will pay for it. last time i stayed at a hotel they charged me $40/24-hours for sub par dsl connection, that was shared btw. so i really dont think they are "just paying off" their internet connection, unless they are dumb enough to pay for outrageously expensive T1.

bachok83 05/20/2009 3:59 AM
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it would be nice if Microsoft add the support to Windows Media Player that one can play music on say 'notebook' and Media Player streams the sound to another PC (entertainment system, where ur speakers are hooked up).

joex444 05/20/2009 4:30 AM
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bachok83 :
it would be nice if Microsoft add the support to Windows Media Player that one can play music on say 'notebook' and Media Player streams the sound to another PC (entertainment system, where ur speakers are hooked up).



Maybe I'm not reading you correctly, but they have. You have two PCs networked together, on one you enable media sharing (something built into Vista and thus Win 7) with your collection of music. On the other, you will see both the source PC and a media device for that PC -- this latter one contains the source PC's music. You simply play the audio files on the PC connected to the speakers, and that decodes it. It sounds like you wanted the source to decode and then stream the sound, an impossible feat; it can stream the encoded files for the host to decode and send to the entertainment system however. This is only slightly more complicated in XP, if you haven't used Vista.

hemelskonijn 05/20/2009 5:51 AM
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This could potentially be awesome since with some nice software you could create a huge mesh network specially in area's that have loads of laptops.

Imagine sitting in the grass half a mile from college playing world of warcraft thanks to all the people in between reading their email.

The software would have to be really complex and awesome though and even so it would require a lot of people to take part in the network to actually make the above scenario possible.

Anonymous 05/20/2009 7:16 AM
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Oh, this is just great!

"Welcome to the Man-In-The-Middle Attack Wizard. Click on the NEXT button to begin the network card configuration."

Just what we need at airports and cafe's now.

ossie 05/20/2009 10:23 AM
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gesha 05/20/2009 1:01 PM
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@ossie

get a life

rodney_ws 05/20/2009 3:04 PM
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I don't see how this will cheat hotels/hot spots out of anything. I'm sure they already limit bandwidth to a certain level... and it's not like this would increase that cap. It'd just be splitting that cap among multiple clients.

Anonymous 05/20/2009 3:49 PM
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There is so many things wrong with this...
1) Man-in-the-middle
2) Reliability
3) Ping

apmyhr 05/20/2009 5:00 PM
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ossie, your overuse of $ to bash Microsoft makes you look like an idiot. How much of a linux fanboy do you have to be to get angry about Microsoft adding a potentially useful feature?

But yes, you are right, Tomshardware is obviously being paid off by Microsoft when they write an article on new Windows features. I mean, why would anyone be interested in learning about features for an operatin system family that only controls 90% of the PC market?

dainsane1 05/20/2009 5:58 PM
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Neat but not new. some Asus laptops and other wireless products allow for just that. never actually tried it but have run across the feature during laptop setup (i think); course since i never used it i may have just misread the feature description.

3p0cHx 05/20/2009 8:27 PM
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Would this be a way to create a fail-over connection, so that if one wifi connection is getting interference, the other virtual connection will take over and you'll resume browsing? Or will it allow for bridging so that if you have 2x54mbit connections, you'll effectivly have 100mb?

tipoo 05/20/2009 9:04 PM
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Just curious, does OSX have a similar feature?

g0rilla 05/20/2009 9:10 PM
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Does this mean we could "Tarzan" (my term - move from one WAP to another without loosing connection) from one wireless network to another when walking around a large hot spot area like a college campus?

justchuck69 05/21/2009 1:17 AM
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only if you have just about any amd or certain intel cpus as some 40% or so of intel cpu ( well the percentage of desktop cpu are higher but the number of mobile cpu from intel that support VT are limited) do not support VT and may be left out in the cold concerning this tech

seldon57 05/21/2009 2:17 AM
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I currently am using a linksys wmp54g network card and using the drivers that come with windows 7 rc am able to see the Microsoft Virtual WiFi Miniport adapter and edit it's properties, but am not yet able to connect it to a network.

Anonymous 05/21/2009 4:34 AM
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I've been using this for years on XP...
http://research.microsoft.com/en-u [...] rtualwifi/
and a download for those that are interested
http://research.microsoft.com/en-u [...] 1dcccead7/

Anonymous 05/21/2009 4:36 AM
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what the hell ..... u sayin Microsoft created a new 2 way wireless collision avoidance system?????!!!!, i have to read the details about that asap.

hemelskonijn 05/21/2009 7:17 AM
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demonic1:

The software you describe does NOT connnect to multiple networks at the same time but hops from network to network as described in the links you posted.
Yes it is transparent to the applications and thus the average computer user wont notice this specially not if you realize the average computer user only uses the computer to surf the web and read email.

justchuck69 05/21/2009 9:36 AM
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am i correct in my last post " only if you have just about any amd or certain intel cpus as some 40% or so of intel cpu ( well the percentage of desktop cpu are higher but the number of mobile cpu from intel that support VT are limited) do not support VT and may be left out in the cold concerning this tech "

does this tech need the virtulization support in the cpu's ?

ie AMD V or Intel's VT ! i know it is needed for the win xp mode but was wondering if this also needs this support?


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