A network designer needs to explain the advantages of route summarization to a client. Which two options are advantages that should be included in the explanation? (Choose Two)

Question

Options

• AIncreases security by advertising fake networks.
• BReduces routing table size.
• CAdvertises detailed routing size
• DUtilizes the routers full CPU capacity.
• EReduces the upstream impact of a flapping interface.

• B
  92% (22)
• C
  4% (1)
• D
  4% (1)

Explanation

Route summarization (aggregation) combines multiple specific routes into one summary advertisement. This directly reduces routing table size (B) across all routers that receive the summary, saving memory and processing overhead. It also isolates route instability (E): when a specific subnet flaps (goes up/down repeatedly), only the local router sees the change-the summary route remains stable and is not re-advertised upstream, preventing unnecessary convergence events across the network. Choice A is incorrect because summarization does not advertise fake routes. Choice C is the opposite of what summarization does-it hides detail, not exposes it. Choice D is wrong because summarization reduces CPU usage, not maximizes it.

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