Which of the following ports allows for secure communications?

The correct answer is B. 22. Port 22 is used by SSH (Secure Shell), which provides encrypted, authenticated remote access and is designed for secure communications. Port 20 is used for FTP (File Transfer Protocol) data transfer, which transmits data in plaintext. Port 23 is used by Telnet, which also transmi

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(39 responses)

A
3% (1)
B
90% (35)
C
5% (2)
D
3% (1)

Explanation

Port 22 is used by SSH (Secure Shell), which provides encrypted, authenticated remote access and is designed for secure communications. Port 20 is used for FTP (File Transfer Protocol) data transfer, which transmits data in plaintext. Port 23 is used by Telnet, which also transmits all data including credentials in plaintext, making it inherently insecure. Port 25 is used by SMTP (Simple Mail Transfer Protocol) for email transmission, which in its basic form is also unencrypted. SSH on port 22 is the only option in this list specifically designed to provide confidentiality and integrity through encryption.

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#Ports#Secure communication#SSH#Protocols

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