Which of the following should you always choose to use to send traffic over the Internet because it encrypts the traffic being transmitted?

A.
Telnet.

B.
FTP.

C.
SSH.

D.
None of the above.

Explanation:
You should rather use SSH, and not Telnet, to send traffic over the Internet. Telnet should not be used because it does not offer data protection. Traffic can easily be interpreted when Telnet is used. Secure shell (SSH) on the other hand encrypts the traffic. Even if traffic is intercepted while it is being transmitted, it will be undecipherable.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 457-458.