I connected two different keyboard to my computer. (Both use USB port to communicate with the computer.) The question is:
Why when I press Caps-Lock or Num-Lock in one keyboard, The related light (The LED on the keyboard) on the other one turns on and turns off also!?
As @Tetsujin mentioned in the first comment, I guess the computer receive the request from one keyboard, and send the answer broadcasting to all ports.If so, why? Doesn't have each port a specific address to send answer just for that address? Doesn't this current mechanism increase vulnerability? (For example a hardware keylogger)
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