Describe characteristics of network topology architectures, 3 tier design. A 3 tier design is the classic, core, distribution, and access layer design, where the core is fast switching, distribution is aggregation and segmenting of networks, policies applied, access control lists, qos etc. Access layer is where the endpoints connect to the network at layer 2. See below:
Some advantages of 3 tier vs 2 tier is the different functions are isolated and modularized and specialized for their purpose. Some of the disadvantages are it’s expensive. It takes up more space and connections.
Ken Hagen CCIE #56460 