NetBT Event ID 4321 errors on Windows Server hint at deeper network issues. Learn how to resolve name registration failures ...

A Cisco switch connected to Cisco PIX firewall via cat5. The switch-side sees CRCs, the firewall side doesn't. Both are hard-set for 100/full. Is this just likely a bad cable, or could it be something ...

This was an inside facing FastEthernet interface on a border router. I solicited the help of our security guy who did track this down to a host infected with some form of Command and Control IRC ...

Interface packet loss provides indications of link problems that shouldn’t go ignored. But then you have to decide on an alerting threshold that indicates a problem without creating too many false ...