[General] What is IP switch? What is Layer-2 switch? What is Layer-3 switch? What's different between these Switch?

Layer 2 switch is a high performance of wire-speed switch to perform Layer 2 switching, also called bridging Switch, forwards packet based on the unique Media Access Control (MAC) address of each end workstation.

Layer 3 switch is a high performance of wire-speed router to perform Layer 3 routing, has built-in Layer-3 Switching domain per device, allowing for individual subnet bandwidth allocation, along with broadcast containment.

IP switch is a Layer 3 switch, the specific Information is based on IP Protocol and Routing protocol.