Port 23 is used by Telnet, an unencrypted remote connection protocol that poses significant security risks. Disabling Telnet and using secure alternatives like SSH (port 22) is best practice.
From CompTIA A+ 220-1101 Official Study Guide, Objective 2.1 – Common ports and protocols:
"Port 23 (Telnet) provides unencrypted remote access and should be disabled to increase security. Use SSH (port 22) for secure remote connections."
Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 2: Ports and Protocols
CompTIA Exam Objectives 220-1101, Domain 2.1
============
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit