Aim and purpose This unit provides the skills and understanding required to design, install and maintain networked systems. It covers topologies, the OSI model and TCP/IP. Unit introduction Networking skills are particularly valued in the IT industry and this unit provides a solid foundation for learners to gain knowledge and understanding of networking models. Learners will be introduced to the physical and logical topologies of networks and understand the purpose and function of network hardware, software and interconnection devices. The unit introduces learners to the OSI model and the TCP/IP protocol suite and their features, functions and standards.