Hub is designed to connect hosts to each other with no UNDERSTANDING of what it is transferring. When a Hub receives a packet of data from a connected device, it BROADCASTS that data packet to all other ports regardless of destination port. HUB operates at Layer 1 (Physical Layer).

Switch also connects hosts to each other like a hub. Switch differs from a hub in the way it handles packets. When a switch receives a packet, it determines what hosts the packet is intended for and sends it to that hosts only. It does not BROADCAST the packet to all the hosts as a hub does which means bandwidth is not shared and makes the network more effcient. Switch operates at Layer 2 (Data Link Layer).

Router is di􀃗erent from a switch or hub since its FUNCTION is to route data packets to other networks, instead of just the local network. Routers operates at Layer 3 (Network Layer).

Hub is designed to connect hosts to each other with no understanding of what it is transferring. When a Hub receives a packet of data from a connected device, it broadcasts that data packet to all other ports regardless of destination port. HUB operates at Layer 1 (Physical Layer).

Switch also connects hosts to each other like a hub. Switch differs from a hub in the way it handles packets. When a switch receives a packet, it determines what hosts the packet is intended for and sends it to that hosts only. It does not broadcast the packet to all the hosts as a hub does which means bandwidth is not shared and makes the network more effcient. Switch operates at Layer 2 (Data Link Layer).

Router is di􀃗erent from a switch or hub since its function is to route data packets to other networks, instead of just the local network. Routers operates at Layer 3 (Network Layer).