ISP_X is IPv4 only in the core with MPLS enabled in the backbone. ISP_X must provide IPv6 services to its customers including IPv6 Internet access.
Which IPv6 transition mechanism allows ISP_X to provide IPv6 connection by levering the existing MPLS core network?
A . Teredo Tunneling
B . NAT64
C . 6PE
D . 6RD
E . ISATAP
Answer: C