Many networks are managed by a computer called a file server.A file server has a large－capacity hard disk and special software that manages access to flies on the network. It controls how data and database are shared among users on the network and how users access master copies of data and application software on the centralized hard disk. It is the file server's job to make sure that users don't accidentally try to update a file at the same time and scramble¹ the data. The file server may also manage the access to an expensive piece of hardware such as a laser printer.

When a file server is used on a LAN, large databases are stored on the server and users may store all of their work flies there as well.This operation is analogous² to someone's manually collecting all the data each day placing them in a file drawer, and then redistributing these data to the workers as needed.

许多网络由一称为文件服务器的计算机来管理。文件服务器具有大容量的硬盘和一些用来管理对网上文件访问的专门软件。它控制着网上用户如何共享数据和数据库，以及用户如何存取中央硬盘上的数据和应用软件的主拷备。确保两个用户不能偶然地在同一时刻对同一文件进行更新或争夺数据也是文件服务器的工作。文件服务器还可以管理对昂贵硬件（如激光打印机）的访问。

当文件服务器用于局域网时，大型数据库就被存储在服务器上，而且用户也可以将其所有的工作文件存放在上面。这就像是一个人每天手工收集所有的数据，放到一文件抽屉中，然后等需要时，再将这些数据发到工作人员手中。