A new web server has been provisioned at a third party hosting provider for processing credit card
transactions. The security administrator runs the netstat command on the server and notices that
ports 80, 443, and 3389 are in a `listening’ state. No other ports are open. Which of the following
services should be disabled to ensure secure communications?

A.
HTTPS

B.
HTTP

C.
RDP

D.
TELNET

Explanation:
HTTP uses port 80. HTTP does not provide encrypted communications. Port 443 is used by
HTTPS which provides secure encrypted communications. Port 3389 is used by RDP (Remote
Desktop Protocol) which does provide encrypted communications.