|  | 11.3 | Distance-Vector Routing
| 11.3.3 | How topology changes propagate through the network of routers
When the topology in a distance-vector protocol network changes, routing table updates must occur. As with the network discovery process, topology change updates proceed step-by-step from router to router. Distance-vector algorithms call for each router to send its entire routing table to each of its adjacent neighbors. The routing tables include information about the total path cost (defined by its metric) and the logical address of the first router on the path to each network contained in the table.