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?
A.
21
B.
22
C.
23
D.
25
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?
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?
A.
21
B.
22
C.
23
D.
25
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