This report provides a comprehensive overview of network design, focusing on the implementation of LAN and WAN networks for a head office and its branches. The report begins with an introduction to networking, emphasizing the importance of data and resource sharing. It then delves into the specifics of LAN design, including the use of routers, hubs, and wireless access points, along with considerations for wired and wireless connectivity. The report analyzes network topologies, specifically mentioning bus topology, and discusses the use of internet protocols for network communication. The WAN design section covers the devices used, such as modems, CSU/DSUs, and routers, along with the choice of wireless media for connecting different office locations. The report highlights the suitability of a packet-switched network structure and recommends OSPF as a routing protocol. The report concludes by summarizing the key aspects of the network design, including the use of specific devices and protocols for efficient communication and information transfer. The report also includes a list of references that were used for the assignment.