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If you don't know anything about networking, how on earth are you going to learn about what port-mirroring is? You start off small, and work your way up from foundations. Hubs can be bought on eBay for cheap, and who cares if it's limited to 1Gbe? This is about learning.

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> If you don't know anything about networking, how on earth are you going to learn about what port-mirroring is?

Through reading and understanding the fundamentals, just like we all had. The concept of port mirroring is super simple, I don’t remember any difficulties with that back then when I was a junior neteng. Nor did I need a hub to learn basics.

I've learned networking by doing but I haven't ever had a hub. When I tried to use Wireshark for the ~first time, and couldn't see traffic not for my host, I Googled that and got a good description. I haven't actually ever used port mirroring yet despite doing a lot of fun stuff with networking.

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