4 years ago (2015-11-19)  computer technology |   First to comment  52 
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C + + scan specified host open port, OS provides a connect () system call, used to establish a connection with a remote host port, if the port is in the frame listening state of the remote host, connect () connection is successful; otherwise, the port is closed.   C++ scan specifies the open ports of the host

 

  
 

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