Gigabit Ethernet (BASE-T) runs at Gbps over Category e or cables. This is the standard for desktops and laptops today. Gigabit (GBASE-T) requires Category a cables and reaches meters. Data centers often use fiber variants like GBASE-SR. I'll explain auto-negotiation next, which lets devices agree on the best speed automatically.
##### ###### ##### ### # # ### # # ###### ## ## ## ## ## ## ## # # # # # ## ##### #### ##### # # # # # # # #### ## # ## ## ## ## # # # # # ## ## # ###### ## ### # ### # ######
$ curl repovive.com/roadmaps/network-design/physical-and-data-link-fundamentals/gigabit-and-10g-ethernet
░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░████████████████████████████████████████████████████████████████████████████████████████████████████████