Which advantage is gained by organizing users into global security groups?

Organizing users into global security groups provides significant advantages in terms of delegating permissions. When users are grouped, it simplifies the management of access controls within an organization's environment. Administrators can assign permissions to a group rather than individual users, which enhances security and efficiency. For example, if a new employee joins and needs the same access as others in their group, the administrator can simply add them to the global security group rather than configuring permissions individually. This approach not only saves time but also helps ensure consistent access controls across users.

By contrast, the other options do not directly relate to the benefits of global security groups. DNS management, antivirus protection, and login times are affected by entirely different factors, such as network configurations, security measures in place, and system performance, respectively. Thus, organizing users into global security groups primarily streamlines the process of managing permissions and access rights within a network.