Hierarchical Internetworking Model (where you should spend your money)
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| Core Layer | The core layer is a high-speed switching backbone and should be designed to switch packets as fast as possible. Should not perform any packet manipulation, such as access lists and filtering, that would slow down the switching of packets. | - no filtering, security slow doesn, or inter-VLAN routing
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| Distribution Layer | layer of the network is the demarcation point between the access and core layers and helps to define and differentiate the core. The purpose of this layer is to provide boundary definition and is the place at which packet manipulation can take place. | -routing, including inter-VLAN routing
-WAN access
- Gate keeper to the core
-Broadcast/multicast domain definition
-security
-queing (print jobs, ect.)
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| Access Layer | layer is the point at which local end users are allowed into the network. This layer may also use access lists or filters to further optimize the needs of a particular set of users | -more specific security
-segment for more collision domains
-Dial on Demand Routing (DDR)
-Ethernet switching
-static routing
-"desktop layer"
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| Types of topologies | 1. Flat 2. Heirarchial Internetworking model 3. Collapsed Core Heirarchial Model | --
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| Flat Networking Topology | LAN made up of switches. Only L2 switching needed for this model | - simple networking scheme
-very secure
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| Heirarchial Internetworking Topology | enterprise network made up of three layers. The desk top/LAN, distribution, and the core allowing different sites of an enterprise work together | - more complex
-larger
- allows for a more expansive network
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| Collapsed Core Heirarchial Internetworking Topology | Heirarchial topology where the distribution and core layers are comined, often to save money | -cheeper alrenative with same complexity
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| Name the three layers of the Heirarchial Internetworking Model | Core, Distribution, and Access | Ciscos way to describe different layers of an enterprise network
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