Still Ethernet via USB 2.0, which means it is not actually gigabit.
I also noticed that. It's only ~280 megabits so seems a bit dishonest to call it gigabit. I guess what they mean is "gigabit ethernet standard" i.e. 1000BASE-T. Also how does it act once its internal receive buffer is full? Is it possible to get the sender to slow down, or does it have to start dropping frames? Will important things such as ARP broadcasts and DHCP requests just risk getting lost?
> While the USB 2.0 connection to the application processor limits the available bandwidth, we still see roughly a threefold increase in throughput compared to Raspberry Pi 3B.
Followed by a table showing 315Mb/s bandwidth, three times that of the 3B but a third that of full-speed Gigabit. And this isn't tucked away in a footnote, it's up front in the middle of the article.