For many products, Microsoft provides the conventional Server licensing with associated user or computer licenses on. There is must be licensed not only individual servers, but also their processors, sometimes the cores, as in SQL Server 2014. In the Standard Edition, you can, for example, buy a server license and for each user a user license (CAL) (see also Microsoft Client Access Licenses - when and which licenses are required). You also have the option to license on a per processor core.
What is ultimately cheaper, you have to calculate with a license specialist. You must license at least four cores per processor; CALs are no longer necessary in this case. The Business Intelligence edition of SQL Server 2014, you can turn to license only after the CAL model. The Enterprise Edition of the new server version only offers the possibility to license by processor cores; you must license at least four cores. That is, you need a license for each core and must purchase four licenses. This also applies if you are installing the product on a single-processor server and only two cores, even if this may be a relatively improbable constellation.
