300-320 Question #304: Real Exam Question with Answer & Explanation

The correct answer is A: Ensure that the network design follows a structured hierarchical topology.. Two key EIGRP scaling best practices are: (A) A structured hierarchical topology (core, distribution, access) limits the propagation of topology changes and EIGRP queries, which is the primary scaling concern; and (B) Route summarization at distribution or edge devices reduces th

Question

Which two design principles should be followed to scale EIGRP properly? (Choose two.)

Options

AEnsure that the network design follows a structured hierarchical topology.
BUtilize route summarization on edge devices.
CImplement multiple autonomous systems, regardless of the size of the network.
DTune EIGRP delay metric on all core devices.
EConfigure offset lists on the network border.

Explanation

Two key EIGRP scaling best practices are: (A) A structured hierarchical topology (core, distribution, access) limits the propagation of topology changes and EIGRP queries, which is the primary scaling concern; and (B) Route summarization at distribution or edge devices reduces the size of topology tables and, critically, limits the scope of EIGRP query propagation - unbounded queries across a large flat network are the most common EIGRP scalability problem. Option C is incorrect - splitting into multiple autonomous systems adds complexity and is not recommended unless there is a specific reason. Option D is incorrect - tuning delay is a metric manipulation technique, not a scalability principle. Option E is incorrect - offset lists manipulate metrics and are unrelated to scaling EIGRP.

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