Signed digital certificates used to secure communication with a web server are MOST commonly associated
with the following ports:
HTTPS authenticates the website and corresponding web server with which one is communicating. HTTPS
makes use of port 443.
A: Port 25 is used by Simple Mail Transfer Protocol (SMTP) for routing e-mail between mail servers.
B: Port 53 is used by Domain Name System (DNS).
C: Port 143 is used by Internet Message Access Protocol (IMAP) for the management of email messages.