Collapsed Core Layer

A

In a two-tier architecture, the network is divided into two layers: the access layer and the core layer. The access layer provides connectivity to end-user devices and is responsible for enforcing network policies such as Quality of Service (QoS) and security. The core layer is responsible for providing high-speed connectivity between different parts of the network and for ensuring efficient traffic flow.

The collapsed core layer is a variation of the two-tier architecture where the core layer is combined with the distribution layer into a single layer. This design is typically used in smaller networks where there is no need for the scalability provided by a separate core layer.

In this context, the function performed by the collapsed core layer is to attach users to the edge of the network. This means that the collapsed core layer provides the connectivity between end-user devices and the rest of the network. This layer is responsible for ensuring that traffic flows efficiently between different parts of the network and for enforcing any network policies such as QoS and security.

The collapsed core layer may also perform other functions such as enforcing routing policies or applying security policies depending on the specific design of the network. However, these functions are not specific to the collapsed core layer and can be performed by other layers in the network as well.

In summary, the collapsed core layer in a two-tier architecture is responsible for attaching users to the edge of the network and ensuring efficient traffic flow between different parts of the network.