In this illustration of packet switching, there is a central router in the middle and multiple source and destination desktop computers on either side. To the left of the central router are two desktop computers, labeled A and B; computer A is sending a dark blue packet to the router and computer B is sending a light blue packet to the router over a 10 Mbps Ethernet. The router contains both dark blue packets from A and light blue packets from B. More packets, both dark and light, are being sent from the router towards the destination computers on the right at 1.5 Mbps. They are being sent towards a router that connects with a computer labeled C, and a second router that connects with two computers labeled D and E.