What is a large concentration of servers working together called?

A large concentration of servers working together is referred to as a server farm. This term describes a collection of servers that are typically housed in a single location and configured to work in unison to manage high volumes of processing, storage, and data transfers. Server farms are designed to improve redundancy, performance, and scalability for applications and services.

In a server farm, the servers can share workloads, which can enhance performance and provide backup capabilities. This is particularly useful for web hosting, cloud computing, and large-scale data processing, where multiple servers are needed to handle the demands of many concurrent users or data processing tasks.

While a server cluster also consists of multiple servers working together, it typically refers to a configuration where servers are tightly coupled to provide failover capabilities or load balancing. A data center is a broader term that includes not just the servers, but also the entire facility, infrastructure, and management systems that support the servers. A network hub, on the other hand, is a simpler device that connects multiple network segments but does not necessarily refer to a collection of servers or computing power.