The figure has five pictures.  Each is a consideration when designing a network.  Picture one is of money and is labeled cost.  Picture two is of a wiring closet with many wires connected to switches and is labeled ports.  Picture three is of a runner and is labeled speed.  Picture four is of modular routers and is labeled expandable and modular.  Picture five is of a woman working on a laptop that is attached to a network equipment rack and is labeled manageable.