Which one of the following security technologies provides safeguards for authentication before
securely sending information to a web server?

A.
Secure/Multipurpose Internet Mail Extension (S/MIME)

B.
Common Gateway Interface (CGI) scripts

C.
Applets

D.
Certificates

Explanation:
Digital certificates provide communicating parties with the assurance that they are
communicating with people who truly are who they claim to be.” Titel: CISSP Study Guide. pg 343.
In this case, if the web server was a bank, you want to have a certificate confirming that they really
are the bank before you authenticate with your username and password.