An administrator notices that a web service that was running properly until recently has suddenly become unreachable from the network. The server is up and running with no recent changes to the firewall. Running systemctl status shows that the service is active (running). What should be the administrator's NEXT step in troubleshooting this issue?
Inspect the /etc/passwd file for any user account discrepancies that might be impacting the web service.
Check the /etc/hosts file for any incorrect entries that might be causing name resolution issues for the service.
Restart the entire server to ensure that all services are loaded properly.
Use netstat or ss to check if the server is listening on the correct port.