| Exam 640-878 | Question id=4903 | Routed Network Technologies II |
Which three statements about OSPFv2 or OSPFv3 authentication are true?
| A. |
On Cisco IOS XR platforms, OSPFv3 authentication can be configured at the OSPF routing process, area, or interface level. | |
| B. |
OSPF authentication on Cisco IOS and IOS XE platforms can be configured per area or per interface. | |
| C. |
On Cisco IOS and IOS XE and IOS XR platforms, the authentication key can only be configured per interface. | |
| D. |
OSPFv3 uses IPsec for authentication and encryption. | |
| E. |
On Cisco IOS XR platforms, the OSPF authentication that is configured for the area overrides the authentication that is configured for the interface. | |
| F. |
On Cisco IOS and IOS XE platforms, the two OSPFv2 authentication methods that are supported are MD5 and SHA1. |