network diagram explain

this diagram illustrate use of a wifi wireless network and router as the central device of a home network see the figure for detailed and description of this layout

as you see the broadband modem connecting to dsl line and wireless router. all device such as Firewall. Mail server , PC, notebook are connecting to a wireless router .a wireless router possess a working network adapter , enables sharing of a high-speed Internet connection.

Wireless routers technically allow dozens of computers to connect over WiFi links
wireless routers also working on Ethernet hubs and switches allow multiple wired computers to network with each other.