This report proposes a network design for XYZ Company, which has branches in Sydney, Melbourne, and Adelaide, focusing on enabling effective communication through Information and Communications Technology (ICT). The design incorporates a three-layered hierarchical network architecture using Cisco Packet Tracer, ensuring connectivity between hosts within each LAN and across different branches via WAN networks with dynamic RIP routing. The report details the IP addressing scheme, including subnet tables with network addresses, broadcast addresses, and IP ranges. It also discusses the selection and configuration of networking hardware, such as routers, Layer 3 switches, Layer 2 switches, and wireless access points, to support both wired and wireless connectivity. The proposed network ensures that hosts from different departments within a LAN can communicate with each other and with other branches and the Internet, validated by ping tests. The document concludes by emphasizing the importance of ICT in facilitating organizational communications.