What are two differences between IPv6 ISATAP tunneling and IPv6 6to4 tunneling? (Choose two)
A. Only ISATAP tunneling transfers unicast IPv6 packets between sites.
B. Only 6to4 tunneling requires 2002::/16 addresses.
C. Only ISATAP tunneling can transfer IPv6 multicast packets.
D. Only ISATAP tunneling transfers unicast IPv6 packets within a site.
E. Only 6to4 tunneling transfers unicast IPv6 packets within a site.