通过编程和服务器建立一条TCP连接，然后利用SNMP协议监测主机上的这条TCP连接，获取监测的信息（本地地址、端口及服务器的地址、端口以及连接的状态）-Establish a TCP connection, and then use this to monitor the SNMP protocol on TCP host connectivity, access to monitoring information (address local address, port and server port and the state of the connection) through programming and server