Certified Information Systems Security Professional (CISSP) Practice Exam 2026 – All-in-One Guide to Mastering Your Certification!

Question: 1 / 1980

Which port does Telnet typically use?

22

23

Telnet is a protocol used for text-based communication over a network, primarily for remote management of devices and systems. It typically operates over port 23. This port is designated for unencrypted connections, allowing users to access remote computers and execute commands as if they were physically present.

Using Telnet does come with certain security concerns, as the data sent over this protocol is not encrypted, making it susceptible to interception and unauthorized access. Therefore, while Telnet serves a specific purpose, its use has declined in favor of more secure protocols like SSH (Secure Shell), which uses port 22. The other ports mentioned—80 and 443—are commonly associated with HTTP and HTTPS web traffic, respectively, and do not apply to Telnet. Thus, the association of Telnet with port 23 is fundamental to its function within network communications.

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80

443

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