When looking at a diagram of a company's network infrastructure and wide area network links, one should be able to have any single device fail and know that the network can keep running. As companies have grown more reliant on WAN links, more of them are adding redundancy to this connectivity through multi-homing, the practice of physically connecting a host to multiple data links. Globally, many companies have turned to multi-homing as a way to ensure that they can continue to operate if there is a problem with the Internet.