What is a significant difference between host and zone keys generated by dnssec-keygen?
A.
There is no difference.
B.
Zone key files contain a public and private key.
C.
Host keys files contain a public and private key.
D.
Host keys must always be generated if DNSSEC is used; zone keys are optional
E.
Zone keys must always be generated if DNSSEC is used; host keys are optional
Explanation: