1. A method for modeling a packet technology service, the method comprising: at a computing platform: providing a plurality of flow interface objects, wherein each flow interface object is associated with a physical device; configuring the flow interface objects into a packet virtual network (PVN), wherein the flow interface objects represent network devices or device sub-interfaces; and displaying the PVN for visually modeling an Ethernet and/or a non-Ethernet packet technology service, wherein displaying the PVN includes displaying the PVN on a computer screen, and wherein the flow interface objects are visually distinguishable on the computer screen based upon a termination type by virtue of displaying different graphical indicators for each of a plurality of different termination types.