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Module 11: Network Design - Coggle Diagram

- - - - the distribution layer aggregates connections from the access layer, offering routing, high availability, and policy enforcement
    - - the core layer acts as the high-speed backbone, ensuring fault isolation and connecting all layers of the network.
    - - the access layer connects users to the network and provides intelligent services
- - - - IP Phone
      - WAP
        
        PoE ports on wireless access points look the same as any other switch port. Check the model of the wireless access point to determine if the port supports PoE.
      - Switch
        
        PoE ports look the same as any other switch port. Check the model of the switch to determine if the port supports PoE.
      - Cisco Catalyst 2960-C
        
        The Cisco Catalyst 2960-C and 3560-C Series compact switches support PoE pass-through. PoE pass-through allows a network administrator to power PoE devices that are connected to the switch, as well as the switch itself, by drawing power from certain upstream switches.
  - - - Cisco Catalyst 3850 Switches
        
        Modular switches can support very high port densities through the addition of multiple switchport line cards. The modular Catalyst 9400 switch shown in the next figure supports 384 switchport interfaces.
      - Catalyst 9400 Switch
        
        Large networks that support many thousands of network devices require high density, modular switches to make the best use of space and power. Without using a high-density modular switch, the network would need many fixed configuration switches to accommodate the number of devices that need network access. This approach can consume many power outlets and a lot of closet space.
  - - - The chassis on modular switches accept field-replaceable line cards.
    - - Special cables are used to connect stackable switches that allow them to effectively operate as one large switch.
    - - Features and options on fixed configuration switches are limited to those that originally come with the switch.
    - - The thickness of the switch, which is expressed in the number of rack units, is also important for switches that are mounted in a rack. For example, the fixed configuration switches shown in the figure are all one rack units (1U) or 1.75 inches (44.45 mm) in height.
  - - - A data center should be built based on switches that promote infrastructure scalability, operational continuity, and transport flexibility. The data center switch platforms include the Cisco Nexus Series switches.
    - - Service provider switches fall under two categories: aggregation switches and Ethernet access switches. Aggregation switches are carrier-grade Ethernet switches that aggregate traffic at the edge of a network. Service provider Ethernet access switches feature application intelligence, unified services, virtualization, integrated security, and simplified management.
    - - The Cisco Meraki cloud-managed access switches enable virtual stacking of switches. They monitor and configure thousands of switch ports over the web, without the intervention of onsite IT staff.
    - - Networks are becoming increasingly virtualized. Cisco Nexus virtual networking switch platforms provide secure multi-tenant services by adding virtualization intelligence technology to the data center network.
    - - These switch platforms vary from fanless switches with eight fixed ports to 13-blade switches supporting hundreds of ports. Campus LAN switch platforms include the Cisco 2960, 3560, 3650, 3850, 4500, 6500, and 6800 Series.
- - - - They provide broadcast containment by limiting broadcasts to the local network.
      - They interconnect geographically separated locations.
      - They group users logically by application or department within a company, based on common needs or requiring access to the same resources.
      - They provide enhanced security by filtering unwanted traffic through access control lists.
  - - - Branch Routers
        
        Optimize branch services on a single platform while delivering an optimal application experience across branch and WAN infrastructures.
      - Network Edge Routers
        
        Enable the network edge to deliver high-performance, highly secure, and reliable services that unite campus, data center, and branch networks.
      - Service Provider Routers
        
        Deliver end-to-end scalable solutions and subscriber-aware services.
      - Industrial
        
        Are designed to provide enterprise-class features in rugged and harsh environments.
  - - - 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.
    - - These routers provide density and resiliency with programmability, for a scalable network edge.
    - - These routers are designed to efficiently scale between large data centers and large enterprise networks, web, and service provider WAN and aggregation networks.
    - - This router is compact and designed for harsh environments.