Please draw an illustration of a typical network topography and explain the details to me.

"As you can see from my diagram, this is a network topology for a medium-sized organization with several departments. I've used a combination of switches, hubs, and routers to segment the network and isolate several of the user groups. This allows me to direct the network traffic more granularly, thereby improving the performance of the network. I've also designed in firewalls and VPNs to prevent unauthorized intrusions while providing the organization's users secure access to the Internet."