The process of changing a program’s internal structure without changing the way the program works is .

Maybe a timeline because it shows what's going on in for a long period of time

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.