education (46) - 3 prepare and expect 911

https://kamchihau.blogspot.com/2022/08/httpskamchihau_20.html
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Ref: https://kamchihau.blogspot.com/2022/08/blog-post.html
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1) Miss_Liao@hospital_hk.org (Ip. 123.123.123)
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2) Miss_Liao@hospital_hk.org (Ip. 321.321.321) <----- Kelvin hack the server of Domain name and change it.
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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. 
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Me: OK.
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Me: How ?
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John : Miss_Liao@hospital_hk.org is bind to 123.123.123 which is Ip of hospital,  Hong Kong. 
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Me: Ok.
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John: Kelvin hack the server of domain name and then rebind Miss_Liao@hospital_hk.org to 321.321.321 which is Kelvin's Ip
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Miss Liao (the boss of the hospital): John keep complaining. It's annoying.  
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Kelvin: Do you wanna insult him?
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Miss Liao: Yes,.
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Kelvin : So, you send an official hospital's email to him and say," You better shut up. The death of your father is arranged long time ago. ".
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Miss Liao : Official email must leave a record in the server of the hospital.
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Kelvin : Don't worry.  I hack the server of domain name and then rebind Miss_Liao@hospital_hk.org to 321.321.321 which is my Ip. And then,  I represent you to send this email of insult to John.  Eventually, no record is left at the server of the hospital. 
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Miss Liao: You are genius. 
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Kelvin: We are Intelligence agency.  Our email can't be traced. 
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