learning and teaching (37)

https://wodewangzhishime.blogspot.com/2022/01/one-day-leopold-holding-bottle-of.html
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Ref: https://wodewangzhishime.blogspot.com/2022/06/httpswodewangzhishime.html

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John : Have a look. https://wodewangzhishime.blogspot.com/2021/07/httpswodewangzhishime_31.html?m=1 . It's about the server of domain name.

Me: Ok.

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1) Jian@police_hk.org (server_ip, 133.133.133) <--- server_ip 133.133.133 belong to the government  of  

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2) Jian@police_hk.org (server_ip, 235.235.235) <---- Kelvin hack the dominan name server and then temporarily bind jian@police_hk.org to 235.235.235 which belong to Kelvin. 

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John: server_ip 133.133.133 belong to the government of Hong Kong. However, server_ip 235.235.235 belong to Kelvin. 

Me: Ok.

John: One day, I went to the police station. I complained about  being "hacked". Mr. Jian is the police who saw me. Guess what happen ?

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Kelvin : Yesterday, John came to the police station. 

Mr. Jian: Yes,. He complained about being hacked. 

Kelvin : You're better tell John, "I'm not interested in your case".

Mr. Jian: How do I tell him, "I'm not interested in your case."?

Kelvin : You send him an email.

Mr. Jian: Jian@police_hk.org belong to police force of Hong Kong.  

Kelvin : So?

Mr. Jian: So,. Every email must leave a record in the server of the government. 

Kelvin: You are childish.  I hack the server of domain name and I rebind Jian@police_hk.org to my server.  No record of email is left in the server of the government. 

Mr. Jian: You are genius. 

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