A 10 G switch is a network switch that supports 10 Gigabit Ethernet (10 GbE) connections. It is designed to provide high-speed data transfer and is ideal for large networks. It is capable of handling large amounts of data traffic and can be used to connect multiple devices, such as computers, servers, and storage systems. It is also capable of providing Quality of Service (QoS) for prioritizing traffic. 10 G switches are available in both managed and unmanaged versions, and can be used in both home and business networks. They are typically more expensive than other types of switches, but offer superior performance and reliability.