I'm studying for the Security+ certification and don't really understand an answer to the question (see below). I've tried searching online and can't seem to find a clear answer on what a certificate CN is and what an A record is...can somebody please explain?...
Which of the following is true when Sara, a user, browsing to an HTTPS site receives the
message: 'Site name mismatch'?
A. The certificate CN is different from the site DNS A record.
B. The CA DNS name is different from the root certificate CN.
C. The certificate was issued by the intermediate CA and not by the root CA.
D. The certificate file name is different from the certificate CN.