In the early 2000s, I went to a store and bought a Netgear "network hub" either exactly this one, or extremely close to it: https://upload.wikimedia.org/wikipedia/commons/d/d9/4_port_netgear_ethernet_hub.jpg
I can't remember the exact model number or anything, so maybe this one is slightly different. But it looked like that one.
Is it really true that this device was so primitive as to send all data coming into it (from the Internet/cable modem), and any data being sent out from any PC connected to it, to all other nodes/network jacks? Or is that just some misconception that I have had for the last 20+ years?
Something about that sounds insanely wasteful, insecure and just plain illogical. It also seems like it would make a big mess of everything. If my brother surfed the Internet and made a request to example.com, while my PC was also powered on, did that "hub" really send the HTTP packets/data to my computer as well? So I could have sat there and sniffed and spied on anything he did?
If true, how did my computer know what to "reject" and what to handle? It just seems... weird. Was it really such a "major feature" to send packets to the right "node" that they had to make a whole new class of products called "network switch"? It doesn't seem reasonable. It's almost as if a "network hub" was invented in the 15th century or something. I must have got this wrong. Please tell me I have.