Which of the following protocol is PRIMARILY used to provide confidentiality in a web based application thus
protecting data sent across a client machine and a server?

A.
SSL

B.
FTP

C.
SSH

D.
S/MIME

Explanation:
SSL is primarily used to protect HTTP traffic. SSL capabilities are already embedded into most web browsers.
Incorrect Answers:
B: FTP is used to transfer files, not to secure data that are transferred.
C: S/MIME is not to protect data sent in web applications. S/MIME, more specifically, is used to secure email
messages.
D: SSH is not used in a web based application. SSH allows remote login and other network services to operate
securely over an unsecured network.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 846