You are multi-homed when you have at least two upstream Tier-1 Internet Service Providers. For instance, ZeroLevity's servers are located in one of the best-connected multi-homed data centers nationally as well as globally. When you host with ZeroLevity, you are connected directly to the Internet through an OC48 via MCI WorldCOM, an OC12 via AT&T, and two OC3's via Sprint, and Level 3 Communications. Why is multi-homing so improtant? Because any one provider may have a huge problem at any time. So the best way to achieve redundancy is to multi-home. Multi-homing also allows you to become closer to your end users by allowing them to connect to your site using the shortest possible path.