It depends. I worked 5 years in telecom sales so let me chime in. You can have a point to point T-1 ( 1.5 meg up and down makes up any T-1) which costs based on how far the connection is, this is the type that would connect directly to your broker' server or to an exchange server. You can also have a straight T-1 which gives you dedicated bandwidth, not shared like on cable or dsl in most cases, but this T-1 also will send your order over the public network. The big difference if your T-1 goes down, because you are business customer, as opposed to a residential customer, they will bring you back up faster. Most cable or dsl services are fine for home based traders like myself. Serious BSD's all probably use point to point, but I don't think many on this thread, including me, have a need for that. Now in the futures when you start increasing your size you may want to look into a dual wan router, which I will be going to later this year, which allows cable and dsl to run into the same router. Use the search or google to read up on it. I hope that helps.