Refer to the exhibit.
You are planning a migration to a dual-stack IPv4/IPv6 campus environment while providing a flexible and scalable design with fault isolation. The design must allow IPv6 devices to tunnel over portions of the campus that are not yet natively IPv6-enabled, including wireless and voice endpoints. You plan requires an interim approach that allows for a faster information of new services without requiring a network wide hot cutover.
Which two services block functions meet these requirements? (Choose two)
A . GET VPN key server
B . GRE tunnel to the local internet edge
C . IPv6 ISATAP tunnel termination point
D . BGP route reflectors
E . policy gateways
Answer: B,C