CompTIA Security Plus Mock Test Q200

Signed digital certificates used to secure communication with a web server are MOST commonly associated with which of the following ports?

A. 25
B. 53
C. 143
D. 443

Correct Answer: D
Section: Network Security

Explanation:
HTTPS authenticates the website and corresponding web server with which one is communicating. HTTPS makes use of port 443.

Incorrect Options:
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.

Reference:
https://en.wikipedia.org/wiki/HTTPS
https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers