The data depicts the global market share held by major Ethernet switch vendors from the fourth quarter of 2011 to the latest quarter. In the first quarter of 2018, Cisco had a global market share of 53.4%. Ethernet switches are an integral piece of information technology infrastructure, capable of receiving, processing, and transmitting data between two devices connected by a physical layer. At their most basic, switches are able to forward data selectively to one or more connected devices on the same network. In this way, Ethernet switches can control the flow of traffic passing through a network, maximizing the network's efficiency and security.
