Which two statements are true of the OSPF link-state routing protocol? (Choose two.)
A. Using the Bellman-Ford algorithm, each OSPF router independently calculates its best paths to all
destinations in the network.
B. Using the DUAL algorithm, each OSPF router independently calculates its best paths to all destinations in
C. OSPF sends summaries of individual link-state entries every 30 minutes to ensure LSDB synchronization.
D. OSPF sends triggered updates when a network change occurs.
E. OSPF sends updates every 10 seconds.
F. When a link changes state, the router that detected the change creates a link-state advertisement (LSA)
and propagates it to all OSPF devices using the 188.8.131.52 multicast address.
Correct Answer: CD
The point of this question is the basis of OSPF.
Incorrect answer A. OSPF send hello packets every 10 seconds, not the updates, OSPF sends triggered
updates when a network change occurs. For OSPF, D Rother use the multicast address 184.108.40.206 to send
packets to DR and BDR, only DR and BDR can get the information from this multicast address.