Cisco Certified Network Professional (CCNP) Question:
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How does the use of a hierarchical routing structure (access, distribution, and core) enable a scalable delivery system?


If a delivery system is not divided into access, distribution, and core layers, every point in the system needs to maintain every possible destination address to make a delivery decision. The use of a layered system means each layer needs only the information necessary to deliver to the next layer, either above or below.

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What does the term information hiding mean in relation to route summarization?Why are multiple protocols used, such as a package, addressing, delivery, and transportation, instead of using one protocol defining everything?