Refer to the exhibit. Where must an architect plan for route summarization for the topology?

Summarizing from the access layer toward the aggregation layer is not typically where summarization occurs, as the access layer originates specific routes rather than summarizing them for upstream devices.

Route summarization should be planned from the aggregation layer toward the core layer to reduce the number of specific routes in the core's routing table. Additionally, summarizing from the aggregation layer toward the access layer provides simplified routing information to access devices, improving network efficiency and stability.

Summarizing from the core toward the aggregation layer is generally not necessary, as the core typically handles highly aggregated routes and does not need to summarize for downstream components.

Summarizing from the core toward the aggregation layer is not a common practice, and summarizing from the access layer toward the aggregation layer is where specific routes are seen, not where summarization for higher layers typically occurs.