Routers function similarly to a 911 dispatcher who sends and controls the distribution of emergency vehicles to the intended location. Routers decide the most optimal way to automatically send [[computing data] to a desired location. They are constantly evaluating current computer traffic and sending data along the most efficient path to its intended destination.
Most routers owned by ISPs are collocated at facilities housing IXPs or ISPbackboneswitches. End users typically keep their routers at their own sites. . . . [R]outers fall into two classifications. Some routers are used to move information within a particular ISP. Routers used for this purpose are called interior routers. Routers that move information between different ISPs are called exterior routers.