Refer to the exhibit.
RTR 1 uses RTR 2 as the primary WAN exit point. When a failure occurs in the link connected to
RTR 2 LAN, it takes about 40 seconds for RTR 1 to use the backup path via RTR 3. Which two
mechanisms can be used independently to improve the failure detection time to 1 second or
less when RTR 1 failover to RTR3? (Choose two.)
A.
Configure EEM on RTR 2.
B.
Change OSPF throttling timer.
C.
Use BFD with OSPF between RTR 1 and RTR 2.
D.
Use BFD with OSPF between RTR 2 and RTR 3.
E.
Tune OSPF fast hello on all the routers.