The USB-C port supports dual role operation, functioning as both host and device. When connected to a host PC, it provides network connectivity and automatically assigns the IP address 192.168.55.100 to your computer, allowing you to SSH into the device:
OR if you've changed either the username or hostname:
ssh <username>@192.168.55.1
It is also possible to share the internet connection of your host PC with the Jetson over this USB interface by enabling IP packet forwarding as seen in this example script.