Cisco uses another model of its own to describe the design of a network. This model consists of three layers.
The core layer is the “center” of this model. Its sole purpose is to switch the network’s traffic as quickly as possible. The distribution layer is comprised of routers, and routing is the task this layer handles. The access layer is the layer closest to the end users, and controlling their access to network resources is the access layer’s primary function.
The core layer is the “center” of this model. Its sole purpose is to switch the network’s traffic as quickly as possible. The distribution layer is comprised of routers, and routing is the task this layer handles. The access layer is the layer closest to the end users, and controlling their access to network resources is the access layer’s primary function.