What are the layers of routers, switches, repeaters, gateways, bridges and so on?
Network layer - data packet, ROUTER (router or three layer switch: exclusive bandwidth, segmentation collision domain, split broadcast domain)Transport layer data segment, 4 layer switching: port number, gateway
Data link layer - MAC and LLC, data frame, switching (two layer switch: exclusive bandwidth, split collision domain, no broadcast domain)
Physical layer - mechanical characteristics, physical standards, bit, HUB (Hub: shared bandwidth, no collision domain, no broadcast domain)
