Following a fire in a data center, the cabling was replaced.

The switches are not the correct voltage.

The HVAC system was not verified as fully functional after the fire.

The VLAN database was not deleted before the equipment was brought back online.

The RJ45 cables were replaced with unshielded cables.

The wrong transceiver type was used for the new termination.

The new RJ45 cables are a higher category than the old ones.