Distance-vector is a type of routing protocol used in computer networks to determine the best path for data to travel. Each router maintains a table that lists the distance to various destinations and the direction (or vector) to reach them. Routers share this information with their neighbors, allowing them to update their own tables based on the received data. In a distance-vector protocol, routers periodically send their entire routing table to adjacent routers. This method helps ensure that all routers have a consistent view of the network. Common examples of distance-vector protocols include RIP (Routing Information Protocol) and IGRP (Interior Gateway Routing Protocol).