Benefits of Cisco Three-Layer hierarchical model Access layer switches ensures that packets are delivered to the end devices. Access layerĪccess layer includes acces switches which are connected to the end devices (Computers, Printers, Servers etc). Distribution Layer ensures that packets are properly routed between subnets and VLANs in your enterprise. Distribution Layer include high-end layer 3 switches. Therefore the Distribution Layer defines policy for the network.
The purpose of this layer is to provide boundary definition by implementing access lists and other filters. The Distribution Layer is located between the access and core layers. The switches operating at core layer switches packets as fast as possible.
The Core Layer routers move information on the network as fast as possible. Core Layer routers are used to merge geographically separated networks. The above picture can further explained based on below picture.Ĭore Layer consists of biggest, fastest, and most expensive routers with the highest model numbers and Core Layer is considered as the back bone of networks. Cisco Three-Layer network model is the preferred approach to network design.
Cisco suggests a Three−Tier (Three Layer) hierarchical network model, that consists of three layers: the Core layer, the Distribution layer, and the Access layer.
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