A network administrator suspects that a network issue is related to an incorrect configuration on a newly deployed router. After interviewing users and identifying the symptoms, the administrator has established a theory. What is the BEST next step to confirm if their theory about the router's configuration is the cause of the issue?
Replace the router with a different model to determine if the issue resolves.
Implement the suspected configuration changes on a test router or in a controlled segment of the network.
Reboot the router to see if the problem persists.
Analyze the router's log files for error messages.