OSPFv3 authentication supports IPsec AH authentication using the ospfv3 authentication command. In which two instances can the authentication configuration be applied? (Choose two.)

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OSPFv3 authentication supports IPsec AH authentication using the ospfv3 authentication command. In which two instances can the authentication configuration be applied? (Choose two.)

to an interface
to an entire area
to individual ABRs
between routers running OSPFv3 and OSPFv2
to DR/BDR elections

Explanation: OSPFv3 IPsec authentication can be applied to a router interface, a virtual link, or an entire area. This authentication requires that every router in the area perform IPsec authentication in order to form neighbor adjacencies. IPsec authentication cannot be established between an OPSFv3 router and an OSPFv2 router.

Exam with this question: Chapter 9: Quiz - OSPFv3 CCNPv8 ENARSI