The part of the computer that contains the brain or central processing unit is also known as the what

System Unit. Eliminate the ones that don't make sense. I don't really like that answer, I'd say Motherboard or CPU.

Answerimage;

Once the twisted pair cable is connected and a network is established the led lights at the back of the computer should be steady. on most ethernet adapters nowadays, a steady green light means that the connection is actively connected to a valid partner at the opposite end. if the status of the led starts flashing, this means that there’s some activity and data is being transferred.