Which component of a Cisco IOS NetFlow solution enables the aggregation of data packets into...

At the solution-architecture level, the exporter is the NetFlow-enabled Cisco IOS device that examines packets, groups packets sharing the configured flow keys, maintains counters in its flow cache, and exports completed flow records. Therefore, D is correct. More precisely, within Flexible NetFlow, a flow monitor and its cache perform local packet classification and aggregation, while the configured flow-exporter component transmits the resulting records. The question uses “exporter” to represent the originating NetFlow device rather than only the IOS configuration object. A collector receives and stores exported records, while an analyzer interprets those records for monitoring, reporting, or security investigation. A sampler reduces the number of packets examined according to a configured sampling method; it does not aggregate all matching packets into flow records. Cisco Flexible NetFlow overview

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