Introduction - If you have any usage issues, please Google them yourself
Network communication process, provide listening socket server must respond to client connection requests, it must provide connectivity to interact with the client socket. There are a host more than one socket server, such as ftp, telnet servers, they are in the initial listening state, waiting for the arrival of connection requests. linux in order to manage these two types of socket provides two hash list: tcp_listening_hash and tcp_ehash, the following analyzes the hash table under the monitor, incidentally, said that under the connection hash table.