This document presents a case study focusing on TCP/IP internetworking for Foreshore IT Solutions, detailing the design and implementation of a network divided into six sub-networks. The solution includes a network topology diagram, an addressing scheme to accommodate 1200 workstations across various departments (Finance Office, IT Call Centre, Finance Department, Marketing Department, Information Technology Department, and Head Office), and a justification for the chosen network configuration. The case study addresses subnet mask calculations, host address ranges, and broadcast address calculations using the Address Resolution Protocol (ARP). It further discusses the implications of scaling the network beyond 1024 hosts per building and provides alternative addressing solutions. The study concludes by emphasizing the importance of network design for organizational communication and provides recommendations for future network expansions. Desklib offers a wealth of similar solved assignments and past papers for students.