Distance-Vector Routing Protocols

This type of routing protocol requires that each router simply inform its neighbors of its routing table. For each network path, the receiving routers pick the neighbor advertising the lowest cost, then add this entry into its routing table for re-advertisement. Hello and RIP are common D-V routing protocols. Common enhancements to D-V algorithms include split horizon, poison reverse, triggered updates, and holddown. You will find a good discussion of D-V, or Bellman-Ford algorithms in RIP's protocol specification, RFC 1058.

source:http://www.freesoft.org/CIE/Topics/117.htm