This report provides a detailed IT network design for a three-floor building with a data center. It encompasses network topology, cabling plans (including LAN and fiber optic), and the implementation of Active Directory for centralized network management. The design incorporates routers, switches, and firewalls for security, including VPN configuration and access control lists (ACLs). The report identifies required servers (web, mail, file), allocates IP addresses and subnet masks, and simulates the network design using Cisco Packet Tracer. It also covers a request for proposal, equipment needs, and measures to prevent security attacks. The report concludes with a discussion of network security, scalability, and the importance of a well-planned network infrastructure. The report emphasizes the need for a secure and efficient network design, suitable for a multi-floor building with a central data center. It also details various network devices, cabling plans, and security measures to ensure a robust and reliable network environment. The report covers various aspects of network design, including cabling, security, and IP address allocation, making it a comprehensive guide to building a secure and efficient IT network.