-a 代表列出所有連線 -n 代表僅列出IP 及Port,不解析為hostname 及service name,速度會快很多
實例:查Gmail IP C:\Users>netstat -na |find "74.125.31.19" TCP 192.168.1.103:50203 74.125.31.19:443 ESTABLISHED TCP 192.168.1.103:50804 74.125.31.191:80 ESTABLISHED TCP 192.168.1.103:50806 74.125.31.191:80 ESTABLISHED