I am extremely new with using ardunio but I wanted to know if it was possible to use a standard Ethernet to communicate with my computer without using the internet. I want to do this since Ethernet would be much faster than the USB which supplied on the board. For example, I want to use a ardunio mega with a Ethernet shield and connect a normal Ethernet cable to my laptop so I can compile and download the code to the ardunio to perform the function without using the internet.
Second question is regarding the connection between two ardunios. I want to connect my computer though usb connection to the usb port of an ardunio uno with a Ethernet shield and then connect a Ethernet from the uno to a ardunio mega. I would like to do this since I want to use the uno to control the inputs (by buttons and joysticks) given by the mega from the motors/servo/sensors.
Please let me know if any of this is possible. Thank you so much.