What is a 'map of maps' in the context of QRadar?

In the context of QRadar, a 'map of maps' refers to a collection where keys are unique and each key maps to one reference map. This structure allows for organized and efficient data management, enabling users to leverage multiple reference maps while ensuring that each key remains distinct. By maintaining unique keys, it ensures that data associations do not overlap, facilitating clearer access and retrieval of information.

This unique key feature is particularly useful in contexts where precise relationships between different data sets are essential. In QRadar, this can help correlate and analyze data from various sources more effectively.

The other options do not accurately represent the concept of a 'map of maps.' For instance, collections that allow duplicates or simple lists do not maintain the necessary unique key associations that characterize a 'map of maps.' These alternatives would lack the organizational structure and precise mapping capabilities that are crucial for effective data management in QRadar.