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Module 11 Netwwork design, image - Coggle Diagram

- - - - Hierarchical - The design facilitates understanding the role of each device at every tier, simplifies deployment, operation, and management, and reduces fault domains at every tier.
      - Modularity - The design allows seamless network expansion and integrated service enablement on an on-demand basis.
      - Resiliency - The design satisfies user expectations for keeping the network always on.
      - Flexibility - The design allows intelligent traffic load sharing by using all network resources.
  - - - Distribution Layer
      - The distribution layer interfaces between the access layer and the core layer to provide many important functions, including the following:
      - Aggregating large-scale wiring closet networks
      - Aggregating Layer 2 broadcast domains and Layer 3 routing boundaries
- - - - Cisco 900 Series
        This is a small branch office router. It combines WAN, switching, security, and advanced connectivity options in a compact, fanless platform for small and medium-sized businesses.
      - Cisco ASR 9000 and 1000 Series Aggregation Services Routers
        These routers provide density and resiliency with programmability, for a scalable network edge.
      - Cisco Network Convergence System 5500 Series Routers
        These routers are designed to efficiently scale between large data centers and large enterprise networks, web, and service provider WAN and aggregation networks.
      - Cisco 800 Industrial Integrated Services Router
        This router is compact and designed for harsh environments.