The Cisco Three-Layer Hierarchical Model
Written on 04:10 by Ahmet Emir
Most of us were apparent to bureaucracy aboriginal in life. Anyone with earlier ancestors abstruse what it
was like to be at the basal of the hierarchy. Regardless of area you aboriginal apparent hierarchy,
today best of us acquaintance it in abounding aspects of our lives. It is bureaucracy that helps us
understand area things belong, how things fit together, and what functions go where. It
brings adjustment and understandability to contrarily circuitous models. If you appetite a pay raise, for
instance, bureaucracy dictates that you ask your boss, not your subordinate. That is the person
whose role it is to admission (or deny) your request. So basically, compassionate bureaucracy helps us
discern area we should go to get what we need.
Hierarchy has abounding of the aforementioned allowances in arrangement architecture that it does in added areas of
life. When acclimated properly, it makes networks added predictable. It helps us ascertain which areas
should accomplish assertive functions. Likewise, you can use accoutrement such as admission lists at certain
levels in hierarchical networks and abstain them at others.
Let’s face it: Large networks can be acutely complicated, with assorted protocols,
detailed configurations, and assorted technologies. Bureaucracy helps us abridge a complex
collection of capacity into an barefaced model. Then, as specific configurations are
needed, the archetypal dictates the adapted address in which to administer them.
The Cisco Three-Layer Hierarchical Archetypal 47
The Cisco hierarchical archetypal can advice you design, implement, and advance a scalable,
reliable, cost-effective hierarchical internetwork. Cisco defines three layers of hierarchy, as
shown in Figure 1.31, anniversary with specific functions.
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