Which of the following is the MOST secure protocol to transfer files?
A. FTP B. FTPS C. SSH D. TELNET
Correct Answer: B Section: Network Security
FTPS refers to FTP Secure, or FTP SSL. It is a secure variation of File Transfer Protocol (FTP).
A: FTP traffic is vulnerable to packet sniffing and other forms of eavesdropping. It is, therefore, not secure.
C: SSH allows a user to run commands on a machine’s command prompt without being near the machine physically.
D: TELNET, by default, does not encrypt any data sent over the connection, and so it is often practical to eavesdrop on the communications and use the password later for malicious
purposes. It is, therefore, not secure.
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 42, 46, 49, 51