A hierarchical network design includes
the following three layers:
- The core layer, which provides optimal connectivity between distribution blocks
- The distribution layer, which
provides policy-based connectivity
- The access layer, which provides
access-layer aggregation and L3/L4 services
The Figure shows a high-level view of
the various aspects of a hierarchical network design. A hierarchical
network design presents three layers - core, distribution, and
access - with each layer providing different functionality.
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