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Which of the following ports should be blocked on the firewall to achieve this?

Lisa, a technician, is asked to not allow FTP traffic on a network. Which of the following ports should be blocked on the firewall to achieve this?

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A.
21

B.
22

C.
23

D.
25

One Comment on “Which of the following ports should be blocked on the firewall to achieve this?”

  1. Shirley Mathew says:

    21 TCP FTP control (command)

    22 TCP UDP Secure Shell (SSH) — used for secure logins, file transfers (scp, sftp) and port forwarding

    23 TCP UDP Telnet protocol—unencrypted text

    25 TCP Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers




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