The layers are referred to using the letters in the form s. The layers are described as the uplink and downlink. The issue is straightforward to track down to the uplink either the downlink or the main layer due to the arrangement and neatness of the network design.It can also be easier to create the network.It lets you make easier purchasing decisions. Each layer is designed to serve an individual function, the owner of the network can identify which switches to buy. azfyywjw38.