What do you call a group of servers working together to host a website with high availability and reliability?

A group of servers working together to host a website with high availability and reliability is known as a web farm. This configuration typically involves multiple servers that share the workload of processing web requests, which enhances both the performance and reliability of the web service. By distributing the hosting responsibilities, a web farm can handle a larger volume of traffic and continue to function even if one or more servers fail. This redundancy is crucial for maintaining uptime and ensuring that the website remains accessible to users.

Load balancers, while relevant, serve as a mechanism to distribute traffic across the servers in a web farm. Network configurations involve the setup of networking components rather than the server grouping itself, and a geographically dispersed service refers to deployment across multiple locations, which is a different concept focused on redundancy and data locality. Thus, the best term that encapsulates a group of servers working in concert for web hosting is indeed a web farm.