sequential (-6)

https://wodewangzhishime.blogspot.com/2021/09/httpswodewangzhishime_42.html

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Ref: https://wodewangzhishime.blogspot.com/2022/03/httpswodewangzhishime_53.html

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Me: In microsoft, there isn't any real port . . In Microsoft, there is a "register". . I call it register_a;

If value of register_a is

1) 0101 , it represent the port of apache. 

2) 0000 , it represent the port of Internet explorer. . 

3) 1111 , it represent the port of Mysql.  

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John: That mean, they are not real input/output port. . They are virtual port under register_a.

Me: Yes, It is dangerous. . Originally , the value of the register_a is 0101 which represent the virtual port of internet explorer. .  Suddenly, hacker change 0101 into 1111. .Consequently, it become the virtual port of Mysql.

John: The connection which is based on the memory of register_a is called virtual connection.