Urgent LAN Security Infrastructure Simulation

I need a professional to create a simulation of a Local Area Network (LAN) that focuses on Security Analysis. This task must be completed ASAP.

Key Requirements:
- Develop a LAN simulation
- Focus on security analysis

Ideal Skills and Experience:
- Strong background in LAN infrastructure design
- Proficient in network simulation tools
- Experience in network security analysis

Please note that the time-frame for this project is very tight. Prompt delivery is crucial.