I have this team case due for networking class tomorrow. I'm supposed to determine what is the best way to connect three locations of a company, spread over the world. Each location has a plant for making boiler parts, as well as offices for designing the parts, part distribution, and sales. Each workstation at the locations are connected at 10Mbps, with the connection between floors at 100Mbps. What's the best way to connect these locations? I'm thinking T1,T3,etc. Thanks