Questions

1. You need to see a list of network services that are listening for incoming connections. Which of the following commands would you use?
   1. sudo systemctl -t service --state=active
   2. netstat -i
   3. netstat -lp -A inet
   4. sudo systemctl -t service --state=listening
2. Which of the following commands would you use to see only a list of established TCP connections?
   1. netstat -p -A inet
   2. netstat -lp -A inet
   3. sudo systemctl -t service --state=connected
   4. sudo systemctl -t service --state=active
3. When Nmap tells you that a port is in an open state, what does that mean?
   1. That the port is open on the firewall.
   2. That the port is open on the firewall and that the service that’s associated with that port is running.
   3. That the port is accessible via the Internet.
   4. That the port’s Access Control List is set to open.
   ...