What command will he use to check the ports applications open?

Alex is administrating the firewall in the organization’s network.

What command will he use to check the ports applications open?
A . Netstat -an
B . Netstat -o
C . Netstat -a
D . Netstat -ao

View Answer

Answer: A

Explanation:

The netstat -an command is used to display all active connections and the TCP and UDP ports on which the computer is listening, without resolving the hostnames. This command provides a list that includes both listening ports and established connections, making it a suitable choice for an administrator like Alex to check the ports that applications have opened on a firewall.

Reference: This explanation is based on standard networking practices and the functionality of the netstat command as described in networking and security documentation123.