You are concerned about your vms receiving rogue dhcp servers. how can you prevent this from happening?

You are concerned about your VMs receiving rogue DHCP servers. In order for you to prevent this from happening, then with VMware, the solution is to set up the VMs as being "NAT" clients. This will set up a private network for the VMs, but will act as a gateway so that those VMs can interact with the rest of the network.

Its all  useless we should stop doing everything digitally

Once the twisted pair cable is connected and a network is established the led lights at the back of the computer should be steady. on most ethernet adapters nowadays, a steady green light means that the connection is actively connected to a valid partner at the opposite end. if the status of the led starts flashing, this means that there’s some activity and data is being transferred.