system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: TCP and UDP using real world examples.

I've read the other posts on here about IT stuff but it doesn't click with me at all. Since I'm creating a post on reddit right now, which sends information to the reddit servers, can you tell me what TCP and UDP are doing in this instance?
gpt
TCP uses back and forth communication, like a telephone call.  If one person didn't hear something, they can ask for it to be repeated.

UDP uses 1 way communication, like TV or Radio broadcasts.  If you miss something, tough noogies, just keep listening.