Modern Cassandra database architecture, complex network of nodes, multiple data centers, racks, servers, horizontal scaling, distributed storage, NoSQL database, high availability, fault tolerance, peer-to-peer communication, gossip protocol, token ring, virtual nodes, snitches, commit log, memtable, SSTable, Bloom filter, disk storage, cloud infrastructure, AWS, Azure, Google Cloud, data processing, analytics, real-time monitoring, dashboard, graphs, charts, metrics, DevOps, containers, Docker, Kubernetes, orchestration, deployment, scalability, reliability, security, encryption.