In database design and administration the hardware and network architecture is an important consideration. The chapter describes four distinct hardware configurations for the deployment of a database based on the size and reach of the database. Identify an briefly describe each of the four

1 . A single desktop system residing on one computer and used only by one or two users.
2 . A shared database that resides on a database server for a LAN. A database of this size can be accessed by all the users in a particular office or department.
3 . A larger database requiring multiple servers, but that is contained within a single server farm or data center. This configuration requires a sophisticated switchboard function with decision and routing protocols to respond to queries and updates.
4 . Finally, when the organization becomes global with many users worldwide (or in multiple locations in a single country), it is often required to have multiple data centers or server farms centers.