In the Cisco hierarchial model, also known as the hierarchial internetworking model, the access layer is responsible for providing end user devices with a connection to network resources.
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The access layer, which is the lowest level of the Cisco three tier network model, ensures that packets are delivered to end user devices. This layer is sometimes referred to as the desktop layer, because it focuses on connecting client nodes to the network. Access layer devices include hubs, multi-station access units and switches.