I need diagram for powerpoint presentation for executives

I need help in designing a graphic diagram to be added in power point slide for IT network.

I need to graphically represent a secure network zone for IoT devices that is part of a bigger IT network.
I need to represent that the small network is subset of the bigger network but its secured by segmenting it.

Also, this network will have vulnerability detection solution to assess it.

It should be clear from the network diagrams that small one is for IoT and one for corporate IT network. Without having crowded simples inside the diagram. The presentation will be for executive management so they can understand the concept from first glance.

Is it possible to help me on this