Large networks usually have one or more servers dedicated to providing a single network service. For example, one or more servers might be designated to provide file services to network users while other servers provide iPrint printing services for the same users.
For smaller organizations, it is often not practical or cost effective to dedicate servers to providing a single service. For example, the same server might provide both file and print services to network users.
Prior to installing a new server on your network, you should identify the service or services that it will provide and see how it will integrate into your overall network service infrastructure.