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CHAPTER 1Hierarchical Network DesignObjectivesUpon completion of this chapter What are the structured engineering prin-ciples of Network Design ? How do you apply the three Hierarchical net-work layers in Network Design ? What are the four basic modules in an enter-prise campus Network architecture that inter-connect via the core? How do the modules of the Cisco Enterprise Architecture model differ? What are some trends that are challenging enterprise Network architectures? How do the Borderless Network , Collaboration Network , and Data Center/Virtualization Network architectures address the Network challenges?Key TermsThis chapter uses the following key terms.

Chapter 1: Hierarchical Network Design 3 Network Requirements (1.1.1.1) When discussing network design, it is useful to categorize networks based on the

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