Network gateway: this is the exit point for your home network. All the traffic going to the internet is routed here, then sent towards the internet. Traffic coming from the internet is also pass through here, and is directed towards the switch
Network switch: this is the “junction” of your network. Each device, the gateway, wifi, tv, etc… Is connected to it. It directs traffic where it wants to go
wifi module: this turns regular wired internet into wifi, handles connections, etc…
tv module: this is especially a device that connects to the internet and get the tv stream from it
Routers are multiple things in one box:
Network gateway: this is the exit point for your home network. All the traffic going to the internet is routed here, then sent towards the internet. Traffic coming from the internet is also pass through here, and is directed towards the switch
Network switch: this is the “junction” of your network. Each device, the gateway, wifi, tv, etc… Is connected to it. It directs traffic where it wants to go
wifi module: this turns regular wired internet into wifi, handles connections, etc…
tv module: this is especially a device that connects to the internet and get the tv stream from it
Also increasingly a VoIP module to replace conventional phonelines.