N10-005 Question #393: Real Exam Question with Answer & Explanation

The correct answer is B: Allow ANY to 192.168.0.15 port 22. SSH (Secure Shell) uses TCP port 22 for encrypted remote access. Even though the server is described as an FTP server, the question specifically asks about allowing SSH traffic to it, so the correct port is 22. Port 21 is used by FTP (File Transfer Protocol) for control connectio

Question

A network administrator wants to add the firewall rule to allow SSH traffic to the FTP server with the assigned IP 192.168.0.15 from the Internet. Which of the following is the correct firewall rule?

Options

AAllow ANY to 192.168.0.15 port 21
BAllow ANY to 192.168.0.15 port 22
CAllow ANY to 192.168.0.15 port 80
DAllow ANY to ANY port ANY

Explanation

SSH (Secure Shell) uses TCP port 22 for encrypted remote access. Even though the server is described as an FTP server, the question specifically asks about allowing SSH traffic to it, so the correct port is 22. Port 21 is used by FTP (File Transfer Protocol) for control connections - that rule would allow FTP traffic, not SSH. Port 80 is used by HTTP (web traffic). Allowing ANY to ANY port ANY would open all traffic to all destinations, which is a severe security risk and far too permissive.

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