SIMULATION You are tasked with verifying the following requirements are met in order to ensure network security. Requirements: Datacenter Ensure network is subnetted to allow all devices to communicate properly while minimizing address space usage Provide a dedicated server to resolve IP addresses and hostnames correctly and handle port 53 traffic Building A Ensure network is subnetted to allow all devices to communicate properly while minimizing address space usage Provide devices to support 5 additional different office users Add an additional mobile user Replace the Telnet server with a more secure solution Screened subnet Ensure network is subnetted to allow all devices to communicate properly while minimizing address space usage Provide a server to handle external 80/443 traffic Provide a server to handle port 20/21 traffic INSTRUCTIONS Drag and drop objects onto the appropriate locations. Objects can be used multiple times and not all placeholders need to be filled. Available objects are located in both the Servers and Devices tabs of the Drag & Drop menu. If at any time you would like to bring back the initial state of the simulation, please click the Reset All button. 
I see Nathan mentioned the subnet sizes and which devices to use, but just to double check: you need /28 subnets for both the Datacenter and Building A, then /24 for the screened subnet (since nothing else fits all those servers). Also, be sure Telnet gets swapped for SSH due to security. That's what I've seen recommended elsewhere too, but open to corrections if I missed something.
