[python] Looking for terminology

[Isaac]

I'm sure there's a name for this process, which would help me find more information.

currently, I have a process that allows users to chat with each other live, using ajax and python. The term I'm trying to find references the process in which one computer asks for information, while the other computer stays silent until new information is ready to be sent. This process restarts when the server says, there's no new information. What's the term for this?

Thank you, internet people.

[Jeff250]

https://en.wikipedia.org/wiki/Comet_%28programming%29

[Isaac]

You're the hero Gotham needs.