An administrator needs to review the open ports on a host. Which of the following commands should they use?

`traceroute -d` is used to trace the route that packets take to a network host, not to list open ports on the local machine.

The `netstat -ano` command displays active TCP connections, listening ports, and the process ID (PID) associated with each connection, providing a comprehensive view of network activity and open ports on the local host. The '-a' flag shows all connections and listening ports, '-n' shows numerical addresses and port numbers, and '-o' shows the owning process ID.