After a security incident, an administrator revokes the SSL certificate for their web server www.company.com. Later, users begin to inform the help desk that a few other servers are generating certificate errors: ftp.company.com, mail.company.com, and partners.company.com.
Which of the following is MOST likely the reason for this?
A . Each of the servers used the same EV certificate.
B . The servers used a wildcard certificate.
C . The web server was the CA for the domain.
D . Revoking a certificate can only be done at the domain level.
Answer: B