Dijkstra Algorithms

To calculate its  routing  table  each router applies an algorithm  called  the dijkstra algorithm to its  state database. The dijkstra algorithm  calculates the shortest path between two points on a network using a graph using a made up of nodes and arcs. Notes  are of two  types networks and routers. Arcs  are the connection between  a router  and a network ( router to network  and network  to router). Cost is applied  only to the are from router to network.  The cost  of the  from  network  to router is always zero .

Costs in the  dijkstra algorithm