Can Rockpis be connected to the Internet via serial port or TYPE-C USB?

#1

Can I use wireless or wired network only?or bluetooth？

#2

yes, you can use USB net:

https://wiki.radxa.com/RockpiS/dev/usbnet

#3

I have never installed Rockchip-ADB.I tried installing Rockchip-ADB, and it said:
E: Unable to locate package rockchip-adb。
Is there a problem with “sources.list”?My system is Armbian Focal 4.4.243.
deb http://ports.ubuntu.com/ focal main restricted universe multiverse
#deb-src http://ports.ubuntu.com/ focal main restricted universe multiverse

deb http://ports.ubuntu.com/ focal-security main restricted universe multiverse
#deb-src http://ports.ubuntu.com/ focal-security main restricted universe multiverse

deb http://ports.ubuntu.com/ focal-updates main restricted universe multiverse
#deb-src http://ports.ubuntu.com/ focal-updates main restricted universe multiverse

deb http://ports.ubuntu.com/ focal-backports main restricted universe multiverse
#deb-src http://ports.ubuntu.com/ focal-backports main restricted universe multiverse
deb http://apt.armbian.com focal main focal-utils focal-desktop.

#4

Even so, running the “modprobe g_ether” command will prompt you:
modprobe: ERROR: could not insert ‘g_ether’: No such device