After a long power outage, which of the following servers should be powered on FIRST manually by a technician, based on server roles?

In a scenario where servers need to be powered on after a long power outage, it's crucial to prioritize the order of startup based on their roles in a network environment. The directory server plays a fundamental role in managing network identities, authentication, and access control for users and devices within an organization. It typically stores crucial information about users, computers, and various security credentials.

When the directory server is up and running, it allows authentication and directory services to be restored first, which enables other servers and services to function correctly. For instance, if a file server, web server, or database server is powered on before the directory services are available, users may encounter issues accessing those resources, as they rely on the directory server for authorization.

In contrast, other servers like the file server, web server, and database server serve specific functions that are dependent upon the foundational authentication and resource management provided by the directory server. Therefore, powering on the directory server first ensures that the necessary infrastructure is in place for the other servers to operate effectively once they are powered on. This strategy minimizes downtime and ensures a smoother recovery process for the overall network.