What term describes the advanced data analysis enabled by cloud usage, often referred to as "big data"?

The correct term that describes the advanced data analysis enabled by cloud usage, often referred to as "big data," is data mining. Data mining involves analyzing large datasets to discover patterns, trends, and insights that can inform decision-making across various domains.

In the context of cloud computing, the ability to store and process vast amounts of data makes data mining particularly effective, as cloud services can provide the necessary resources to analyze complex datasets without the limitations of local hardware. Organizations leverage cloud platforms to perform data mining on big data, which enhances their analytical capabilities and helps them derive more significant insights from the information they collect.

The other options, while relevant in their respective fields, do not accurately describe the process of analyzing big data through advanced methods. Denial of service refers to a type of cyber-attack aimed at making a service unavailable, which is not related to data analysis. A Demilitarized Zone describes a physical or logical subnetwork that contains and exposes an organization's external services to an untrusted network, primarily for security purposes, rather than for data analysis. Data portability concerns the ease of transferring data between different systems or services and does not specifically relate to the analytical processes associated with big data.