SY0-301 · Question #127
Pete needs to open ports on the firewall to allow for secure transmission of files. Which of the following ports should be opened on the firewall?
The correct answer is C. TCP 22. TCP port 22 is used by SSH (Secure Shell), which includes SFTP (SSH File Transfer Protocol) and SCP (Secure Copy Protocol) - both of which provide encrypted, secure file transfer. TCP 23 (A) is Telnet, an unencrypted remote terminal protocol that should not be used for secure…
Question
Pete needs to open ports on the firewall to allow for secure transmission of files. Which of the following ports should be opened on the firewall?
Options
- ATCP 23
- BUDP 69
- CTCP 22
- DTCP 21
How the community answered
(45 responses)- A2% (1)
- B7% (3)
- C89% (40)
- D2% (1)
Explanation
TCP port 22 is used by SSH (Secure Shell), which includes SFTP (SSH File Transfer Protocol) and SCP (Secure Copy Protocol) - both of which provide encrypted, secure file transfer. TCP 23 (A) is Telnet, an unencrypted remote terminal protocol that should not be used for secure communication. UDP 69 (B) is TFTP (Trivial File Transfer Protocol), a simple, unencrypted protocol used for transferring files in network booting scenarios - it has no authentication or encryption. TCP 21 (D) is the command channel for FTP (File Transfer Protocol), which transmits data including credentials in cleartext and is not considered secure.
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