How are simultaneously connectable two or more PC using an "internet key" or using a mobile phone modem: A low cost solution

Abstract

This paper shows how two or more PC are simultaneously connectable using an "Internet Key" or using a mobile phone modem through crossed Ethernet cable. These simple "tricks" represent low cost solutions to overcome expensive routers. Bluetooth connection may overcome the use of the Ethernet cable having so a wireless network. Science Information Lab (or Physics Lab) so may have a benefit in solving cost problems particularly in schools with low budget. © by the Sociedade Brasileira de Física.