152、which ipv6 first-hop security feature blocks traffic sourced from ipv6 addresses that arc outside the prefix gleaned from router advertisements?

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单选题

152、which ipv6 first-hop security feature blocks traffic sourced from ipv6 addresses that arc outside the prefix gleaned from router advertisements?

A.

IPV6 RA GUARD

B.

IPV6 DHCP GUARD

C.

IPV6 SOURCE GUARD

D.

IPV6 PREFIX GUARD

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CCIE

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