Which of the following should be used as a replacement for Telnet for secure remote login over an insecure
network?

A.
S-Telnet

B.
SSL

C.
Rlogin

D.
SSH

Explanation:
Secure Shell (SSH) works as a type of tunneling mechanism that delivers terminal like access to remote
computers. SSH should be used instead of Telnet, FTP, rlogin, rexec, or rsh, because it is more secure.
Incorrect Answers:
A: S-Telnet is only used for IBM 5250 data streams.
B: SSL is supported for Telnet implementations.
C: Rlogin is a software utility for Unix-like computer operating systems that enables users to log in on another
host via a network. It is, however, less secure that SSH.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 860
https://en.wikipedia.org/wiki/Telnet
https://en.wikipedia.org/wiki/Rlogin