I want to share connection between 2 PCs at my home. My connection is Airtel broadband 512 Kbps. First of all, my question is whether sharing is allowed in the airtel broadband? Second question is, how to do it using a switch. I have D-Link 10/100 Fast Ethernet Switch. It worked yesterday and i connected both of my PCs separately logging in. Now only one is getting connected. Third question is how to share folders between the two? ie., how to make a LAN between the two? When i try to connect , i one PC it goes untill "verifying username and password". then "Error 721" appears. The other computer gets connected. some times the opposite happens. Please help.