Home Network, Halprin

I have a desktop, house phone, printer, scanner, and fax connected to a switch by ethernet.  The switch is connnected to a router.  All these devices have internet connection.  Also, A printer, computer, cellphone, and TV are connected with wifi.  I had no idea how things were sent from place to place using the internet, and finding out things travel in packages through light was surprising.  I would want other people to know what ethernet is and how it can be used.  

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