Graceful Shutdown behavior ambiguity in Reference Guide

[philsttr]

I'd like for the following quote in the Graceful Shutdown documentation to be clarified...

The exact way in which new requests are not permitted varies depending on the web server that is being used. Jetty, Reactor Netty, and Tomcat will stop accepting requests at the network layer.

Specifically, does "stop accepting requests at the network layer" refer to new connection requests (meaning the client would see connection refused) or new requests on existing (persistent) connections or both? If it stops accepting requests on existing connections with no requests currently being processed, are the existing connections closed immediately or after the graceful shutdown timeout?