According to RFC 4890, which four ICMPv6 types are recommended to be allowed to
transit a firewall? (Choose four.)

A.
Type 1 – destination unreachable

B.
Type 2 – packet too big

C.
Type 3 – time exceeded

D.
Type 0 – echo reply

E.
Type 8 – echo request

F.
Type 4 – parameter problem