NETWORK MODELS
A network allows the sharing of hardware, software, and data resources in order to
reduce expenses and provide more capability to users. When planning a network design,
you must consider network terms and concepts, including the OSI model, network modeling
tools, network topology, network protocols, licensing issues, and wireless networks,
which are covered in this section. Other important issues, such as network performance
and security, are covered in Chapter 12, Managing Systems Support and Security.