Which parameter ensures that Samba behaves as a domain master browser?

The parameter that ensures Samba behaves as a domain master browser is "domain master." This setting is essential for maintaining the browsing structure of a network by coordinating the registration of all available resources within the domain. When Samba is configured with this parameter set to yes, it takes on the role of a domain master browser, which means it will actively manage the list of shared resources and help ensure that clients can accurately discover services available on the network.

A domain master browser works in a hierarchical browsing system where it communicates with other browsers in the network, thereby acting as a central point of information. This central role helps minimize conflicts and improves the efficiency of resource browsing within mixed environments consisting of Samba and other Microsoft Windows machines.

Other choices, while related to browser functionality, do not effectively represent the role of a domain master. For instance, the "master browser" term is often used in contexts that refer to the primary browser for individual workgroups or networks, but it does not encapsulate the broader scope provided by the domain master role in a domain context. Therefore, the choice of "domain master" accurately reflects the function needed for managing the browse list in a domain environment.