After an office move, what is the first thing to check if workstations cannot get a valid IP address?

When troubleshooting network connectivity issues, particularly when workstations are unable to obtain a valid IP address, the first step should involve checking the physical connections, which is why verifying that the cables are functional and properly plugged is crucial.

If the network cables are damaged, improperly connected, or not connected at all, the workstations will not be able to communicate with the network, preventing them from receiving an IP address from the DHCP server. Ensuring that cables are intact and securely connected can quickly resolve issues related to physical connectivity.

While ensuring that network switches are powered on is important, it typically comes after confirming the physical connection since the switches must be receiving power to function, but often won't resolve the problem if the cables are an issue. Checking the DHCP server settings and rebooting workstations are also valid troubleshooting steps, but they usually come after confirming that the workstations have a stable and functioning connection to the network itself. Prioritizing the verification of cable connectivity addresses the most direct cause of the problem early in the troubleshooting process.