The best part is that it gives you a graphical representation of your existing infrastructure. This allows you to compare both the current and the proposed network layouts.The network layouts can be saved and reused later if needed. I have been working on a single node network and it was a bit difficult to draw the network topology. But, hava.io is pretty good at it. If you are looking for a tool to create and manage your network topology, then this is the right tool for you. I am using it to create a network topology on a single node network.