What defines a workgroup in a network?

In a network context, a workgroup is defined as a decentralized configuration where computers are linked together to share resources, but each computer operates independently. This means that there is no centralized authentication system; instead, each machine manages its own local user accounts and authentication processes. This characteristic enables users on the network to connect and share files or printers without needing to rely on a singular, authoritative controller or service to validate their identities.

The lack of a centralized system is critical because it distinguishes workgroups from domain-based networks, where a central domain controller manages authentication and permissions for users. Thus, the defining feature of a workgroup is its reliance on local account management without interdependencies on a centralized network infrastructure. This also allows for increased user autonomy, as each computer can have its own set of user accounts, groups, and permissions.

The other aspects mentioned in the question don't align with the fundamental characteristics of workgroups. For example, workgroups do not involve multiple domain controllers or cloud-based services, nor do they disable local accounts as that would contradict their fundamental structure.