哪个命令会扫描 172.17.0.1，并将普通格式的结果保存到 /root/open_ports.txt？
172.17.0.1
/root/open_ports.txt
nmap 172.17.0.2 -oN /root/open_ports.txt
nmap 172.17.0.1
nmap 172.17.0.1 -oN /root/open_ports.txt
nmap 172.17.0.1 -oN /root/scan_results.txt