A network administrator is troubleshooting a connectivity issue within a corporate network. After confirming that the issue is not related to the end devices, they decide to apply the 'divide and conquer' methodology. What is the BEST step the administrator should take next to isolate the problem?
Check configurations on all devices for any mismatches or errors.
Reboot key networking devices to see if the problem resolves.
Test connectivity in each individual network segment or subnet to narrow down the problem area.
Test the functionality of each individual networking device starting from the network perimeter.