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
Explanation: