SharePoint Server 2013, both standard and enterprise, come with site templates for a Basic Search Center and an Enterprise Search Center. SharePoint Foundation only has the template for the Basic Search Center. Adding a Search Center to a site collection provides users with more advanced search options and scopes. The Enterprise Search Center comes with built in tabs on the search results page that includes a People search scope. To use the Enterprise Search Center the site collection has to have the Publishing Infrastructure feature activated. Once a Search Center has been created the site administrator can configure the site's default search box to link to it.
The following walk-through will show you how to create an Enterprise Search Center and configure a site to use it for search results.
The exercise at the end of this lesson performs the same steps and they only need to be done once for a site.
If the Publishing Infrastructure is not activated for the site collection, we will get the following error:
You got back results from another site collection because with the Search Center you can pick the Everything option that includes everything within your farm.