200-301: Cisco Certified Network AssociateDemo

In a two-tier campus design, the collapsed core combines the core and distribution layers, so it performs the distribution-layer responsibilities such as Layer 3 forwarding and policy-based routing control. That includes enforcing routing policies between the access layer and the rest of the network. Attaching users is an access-layer function, while traffic marking and security policy application are not the primary defining function of the collapsed core in this model.