Your company has recently upgraded its network infrastructure, leaving several old switches and routers that need to be disposed of. In order to prevent potential data breaches from incorrect disposal, what is the MOST important step that should be taken before physically disposing of this networking equipment?
Ensure devices are powered off and unplugged from the network
Perform a factory reset and wipe configuration on the devices
Write down the devices' serial numbers
Advertise the sale of old equipment on a public auction site