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A successful network implementation starts with a competent network design. This is the first of four articles that focus on the design of IP-based networks, due to the prevalence of IP as the de-facto standard desktop protocol.Pass4sure 200-120 A modern IP network supports diverse application; along with traditional data applications, IP has become a transport mechanism for real-time applications such as voice, video and multimedia. As a result, IP network design has become more challenging.