Which authentication mechanism is available to OSPFv3?
A. simple passwords
B. MD5
C. null
D. IKEv2
E. IPsec AH/ESP
Answer: E
Which two IPv6 tunnel types support only point-to-point communication? (Choose two.)
A. manually configured
B. automatic 6to4
C. ISATAP
D. GRE
Answer: A, D
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