I used to use a linksys wireless B router at home with some B adapters. Recently I upgraed the router to a linksys wireless-N router. However, I am too lazy yet to buy the G adapters for upgrading. However, my laptop is equiped with wireless-G adapter and so as one of the desktop at home. Now, I connect everything to the new wireless N router. Perfect.. everything works. The laptop is connected with the router at 54M while the PCs with B adapters are connected at 11M. Since wireless B only support WEP and not WPA, so I was using WEP all along. On top of that, I read from somewhere that if there is a single PC connecting wirelessly with wireless B, even though some PCs are connected at 54M, they are indeed running at 11M. So here is what I did today. I took out the old wireless B router, connect it with the wireless N router with a network cable. I set the wireless B router address (192.168.1.2) different from the wireless N router address (192.168.1.1). I disabled the wireless B router's DCHP, I setup SSID (e.g. ABCD) with the wireless B and a new WEP key. At the Wireless N router, I use another SSID (e.g. EFGH), enable DCHP, and use WPA. And I setup each PCs accordingly. Perfect! now the PCs with B adapters and connecting with the wireless B router (WEP) while the PCs with G adapters are connecting to the wireless N adapters (WPA). Everything works! Now my question is, in theory, should the PCs with G adapters running at 54M true speed? Please note that the gateway for all PCs are 192.168.1.1, the IP address of the wireless N router.

If you've got the same constellation but all wired. One PC has 10 Mbit/s all the others have 100 MBit/s. Gateway is also 100 MBit/s. What do you think about the speed? Wireless or wired, it's only a transport medium.