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I have an ASUS USB-N13 wireless adapter and three laptops in a home. I've tried multiple times to create an ad-hoc network following the 802.11n standard, but failed each time. The laptops have Intel WiFi Link 5100 802.11a/b/g/n wireless adapters.

I tried to create a network with WPA2 personal encryption. That failed (couldn't connect). With WEP encryption, it connected, but with the 802.11g standard, not 802.11n.

How can I create an 802.11n-based network? Do I definitely need a router to use the 802.11n standard?

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migrated from Apr 25 '10 at 13:56

This question came from our site for system and network administrators.

up vote 2 down vote accepted

The wireless network structure that you describe is called ad-hoc, which is the mode for wireless devices to directly communicate with each other. The alternative when using a router is called infrastructure mode.

For most manufacturers of wireless adapters, 802.11n is only possible in infrastructure mode, which requires a router. Without a router, you won't get beyond 802.11g. You should also get a router that allows setting an option for "N only", so as to force all laptops to this mode.

For example, this is what Netgear says:

IEEE wireless standards are used for all NETGEAR wireless products. Standards IEEE 802.11b and IEEE 802.11g specify that when in Ad-Hoc mode, wireless products only need to support 11 Mbps. These IEEE standards apply to "b", "g" and "Super G" products.

To get top performance, use Infrastructure mode instead.

And this is what D-Link says:

Q: Why can´t I get the advertised speed and performance when in Ad-Hoc mode?
A: D-Link wireless products follow the IEEE 802.11 standards. The 802.11b and 802.11g standards specify that Ad-Hoc mode only needs to support up to 11Mbps. For best results, use an access point or wireless router and set your adapters to Infrastructure (station) mode.

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One problem at emerges a lot during N networking is G support. If you do not require G support try turning it off in the router. It has been known to distabalize the whole network.

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we don't use router just 3 laptop ( for ex we play call of duty 4 with laptops after for a while game stacks ) – xpugur Apr 25 '10 at 22:00

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