RIP
RIP is the most commonly used routing protocol to transfer information between routers.
RIP calculates distances (hops) between destinations using the distance-vector method.
This protocol counts the number of hops from point to point. A hop count of three indicates three routers between the packet’s current location and its destination.
If multiple paths to the destination exist, the path with the fewest number of hops is chosen.
RIP updates neighboring routers every 30 seconds with its entire table.