In some cases (e.g., use different Internet services; use higher bandwidth with much lower cost; intelligently coordinate multiple Internet connections), we have the opportunity or have to simultaneously use multiple Internet connections from the same ISP or different ones. In this case, in addition to using a router or switch that has multiple WAN ports and supports the broadband overlay function, we can also choose to use the software solution such like iNetFusion in order to make full use of all Internet connections available.