Which of the following best describes the structure of a Cassandra cluster?

The structure of a Cassandra cluster is best described as a decentralized network of nodes with no single point of failure. This characteristic is fundamental to Cassandra's design, enabling it to achieve high availability and fault tolerance. In a Cassandra cluster, all nodes are equal and can serve read and write requests. This peer-to-peer architecture ensures that if one node goes down, others can handle the workload without interruption, thus avoiding any bottlenecks or single points of failure commonly associated with master-slave architectures.

This design is crucial for applications requiring continuous uptime and reliability, which is a key advantage of using Cassandra for distributed data storage. Moreover, data in Cassandra is automatically replicated across multiple nodes, further enhancing fault tolerance and data availability. The lack of a master node allows for better performance and scalability, as any node can be added or removed without disrupting the entire system.