system
Given the following post, respond as if you're commenting on Reddit:
human
[TRON] Has the internet ever been explored or mentioned in the digital world? Could the TRON world be hooked up to the internet and if so what would happen?
gpt
The first Grid that Flynn went to was the ENCOM mainframe, where the Master Controller Program ruled. The MCP planned to take over other mainframe computers, including the Pentagon and the Kremlin, so we can assume that Grid knew of and was connected to an Internet of some sort. Lightcycles zipping across phone lines, sending out requests and bringing back data.

The Grid created by Flynn and CLU seems to have been a standalone system, with no I/O connection with the internet. CLUs plan is not to take over the world via the internet, but to use a physical army to take over the real world, so it's likely he doesn't know about the Internet and other computers. If someone ever plugged an ethernet cable into CLUs world, he would immediately set about erasing the operating systems of everything and replacing them with a more perfect ENCOM OS. With his ability to repurpose programs, it wouldn't be a cyber-war, it would be a cyber-genocide.

But CLU was reintegrated. He's gone now, and we're all safe. Right...?