# 12D Sentence Review

Before I ask why a service is unavailable, I first need to know where it runs and how a request reaches it.
These arrangements can look similar in a browser while depending on different ports, network routes, and configuration files behind the scenes.
The next step is to check which process is running and whether it is listening at the address that the client uses.
I find it helpful to follow one request from the browser to the application and identify each important connection along that path.
Configuration describes how a system is intended to behave, while runtime state describes what it is actually doing at a particular moment.
Likewise, changing a configuration file does not always update a running process immediately; some applications need a reload or a restart.
A successful change on my laptop does not prove that the same configuration is active on the server used by other people.
When the settings and state are documented separately, it becomes easier to repeat a setup and understand why two machines behave differently.
Could you check which services are running inside the virtual machine and distinguish them from the services running directly on the host?
The configuration says the service starts automatically, but does that prove it is actually running after the last restart this morning?
Please also explain whether the changed settings have been applied, because I edited the file but did not restart the process afterward.
Good; keep the explanation focused on this actual setup, and show where a request stops if the browser cannot reach the service.