Telnet is a network protocol used on the internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. It is typically assigned to port 23. Telnet is known for not encrypting its communications, which poses a security risk. As a result, it has largely been replaced by Secure Shell (SSH) in most secure environments where privacy and integrity of the transmitted data are concerns.
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What is Telnet and how does it work?
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Why is the lack of encryption in Telnet considered a security risk?
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What are the alternatives to Telnet for secure communications?