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Audience: Newbies - Self Learners
Last Updated: 3/12/2005 12:10:22 AM
Original Creation Date: 3/12/2005 12:10:22 AM
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108Mbit wi-fi routers - Fact of Fiction

By Erik Rodriguez

This article describes the scam manufacturers are using to create 108Mb wi-fi routers.


When I first saw the 108Mb wi-fi routers, I knew something wasn't right. Fast Ethernet has a maximum throughput of 100 Mbits/second, while 802.11g has a maximum throughput of 54 Mbits/second. So how could signal speed traveling over 802.11g be doubled?


In the "olden days," it was possible to combine 2 separate dial-up modems to double your speed. This could only be done with certain modems (shotgun modems) and your ISP would have to support it. Something like this can be done with broadband connections. If you have two cable/DSL connections, and a special router, you can in combine the two connections to "load balance." You cannot combine two 3 Mbit connections to get a 6 Mbit connection. The architecture of TCP/IP does allow for such operation.


The problem with using a process like this for wi-fi is that you must combine channels. There are 11 channels for use in the U.S. with wi-fi. To create a "shotgun" effect, channel bonding merges the frequencies used by multiple channels. This creates interference among surrounding networks. Routers that are capable of running at 108Mbits/second are actually routers certified to run 802.11g (54 Mbits/sec) with a added boost of of channel bonding. You should know that wi-fi routers running at 108 Mbit/second is not a standard. It is method used by the touter, and it is not enabled by default. It must be manually set to run at 108Mbits/second. The result is interruption of service for surrounding networks. Also, as with everything else you will never get the full 108/Mbits/second. At best you will get half of that, but with wireless, you're actually talking about get 1/4 of that!

You can view a video segment of the channel bonding by clicking the image below:

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