Certified Ethical Hacker Version 11 (CEHv11) Practice Test

Remote login without encryption is provided by Telnet, which uses TCP port 23. Telnet transmits the session in plaintext, including usernames and passwords, making it easy for attackers to capture credentials on the network. That insecure behavior is precisely why it’s associated with unencrypted remote management. In contrast, SSH offers encrypted remote login and typically runs on port 22, providing a secure alternative. The other options serve different purposes—HTTP for web traffic (port 80, or 443 for HTTPS) and POP3 for email retrieval (ports 110 or 995)—and do not establish a remote login session.