Comptia Security Plus Mock Test Q102

Which of the following is BEST used as a secure replacement for TELNET?

A. HTTPS
B. HMAC
C. GPG
D. SSH

Correct Answer: D
Section: Network Security

Explanation:
SSH transmits both authentication traffic and data in a secured encrypted form, whereas Telnet transmits both authentication credentials and data in clear text.

Incorrect Answers:
A: HTTPS provides the secure means for web-based transactions by utilizing various other protocols such as SSL and TLS.

B: Guarantees the integrity of a message during transmission, but it doesn’t provide for non-repudiation.

C: GNU Privacy Guard (GnuPG or GPG) is a GPL Licensed alternative to the PGP suite of cryptographic software. Pretty Good Privacy (PGP) is a freeware email encryption system.

References:
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 42, 46
http://en.wikipedia.org/wiki/GNU_Privacy_Guard
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, p. 272