sequential (87) RJ45 (Port A and Port B)

https://wodewangzhishime.blogspot.com/2023/08/2001-4-airplanes-were-hacked.html?m=1

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Ref: https://wodewangzhishime.blogspot.com/2021/09/httpswodewangzhishime_11.html

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John: Look at the first picture. Ther're 2 way of connection of RJ45. Both ways are OK. Let me explain the 2nd picture.

Me: OK.

John: When Port A is being input, Port B is with the status of outputing.

Me: OK.

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John: Look at the 3rd picture. When Port B is being input, Port A is with the status of outputing.