To scale the hierarchical model, Cisco introduced the Enterprise
Composite Network model, which further divides the enterprise network into
physical, logical, and functional boundaries. The Enterprise Composite Network
model contains functional areas, each of which having its own Building Access,
Building Distribution, and Building Core layers.

The
Enterprise Composite Network model meets these criteria:
- It defines a deterministic network with clearly defined boundaries between
modules. The model also has clear demarcation points, so that the designer
knows exactly where traffic is located.
- It increases network scalability and eases the design task by making each
module discrete.
- It provides scalability by allowing enterprises to add modules easily. As
network complexity grows, designers can add new functional modules.
- It offers more network integrity in network design, allowing the designer
to add services and solutions without changing the underlying network
design.
Benefits of the Enterprise Composite Model
The Enterprise
Composite Model has a number of benefits for each of the submodules where it is
implemented.
