When DNS fails, you can ping IPs but not names. Websites show "DNS_PROBE_FINISHED_NXDOMAIN."
Troubleshooting steps:
Test with nslookup google.com or dig google.com
Try a different DNS server: nslookup google.com 8.8.8.8
Clear local DNS cache (ipconfig /flushdns on Windows)
Check your configured DNS servers in network settings
If public DNS works but internal doesn't, the problem is your internal DNS server, not the client.