Network theory is a method for analyzing the connections between nodes in a system. One of the most compelling aspects of network theory is that discoveries related to one field, such as cellular biology, can be abstracted to a form that applies directly to a completely different field, like interstate traffic patterns. The most well-known application of network theory is social networking. In a social network, each person is a node connected to other nodes. Additionally, a fraction of nodes within one network, so-called interlinks, will connect to nodes in neighboring networks.