Which command enables authentication at the OSPFv2 routing process level?

Posted by: Pdfprep Category: 210-260 Tags: , ,

Which command enables authentication at the OSPFv2 routing process level?
A . area 0 authentication message-digest
B . area 0 authentication ipsec spi 500 md5 1 234567890ABCDEF1234567890ABCDEF
C . ip ospf authentication message-digest
D . ip ospf message-digest-key 1 md5 C1sc0!

Answer: A

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