What is the difference between a bridge, a gateway, a switch, a repeater, and a router?

RepeaterIt is a device that connects network lines and is often used for Bidirectional Forwarding of physical signals between two network nodes. Relay is the simplest network interconnection device and belongs to the physical layer.

BridgeIt is a layer-2 (data link layer) device used to isolate conflicts, but not broadcast. It is often software-based and rarely used now.

VswitchIt is a multi-port L2 (data link layer) device, also called a multi-port bridge. In addition to the functions of the bridge, it also has specific advanced functions, such as routing.

VroIs a layer-3 (Network Layer) device used for Path Selection and can isolate broadcast. 

GatewayIs the device used to connect to a computer network with many different protocols. It can connect computer networks with different architectures. InOSI/RmThe gateway is a device at the highest level (Application Layer.