Betty Waiting on Fred's Frame That Was Sent to Barney

As seen in the figure, Fred's frame is passing over the cable to the hub, and the hub repeats the frame out all other portsincluding the one connected to Betty. Due to CSMA/CD logicwhich is useful logic because it prevents collisionsBetty must wait even though she simply wants to send a frame to Wilma. It's like paving a beautiful wide road and only having one lane, so everyone must wait until one car finishes driving past before the next car can use the road.