What data is used by OSPF and ISIS for loop prevention?
- hop count to the destination
- feasible distance calculation to the destination
- autonomous system path to the destination
- a synchronized map of the network
Explanation: OSPF and ISIS are link-state routing protocols. As link-state routing protocols they have a synchronized and identical map of the network. Using the complete map of the network, every router in the network then runs the Dijkstra shortest path first (SPF) algorithm to calculate the best shortest loop-free paths.
Exam with this question: Chapters 6 - 7: Routing Essentials and EIGRP Exam
Please login or Register to submit your answer