Lets see What is SAP EP (Enterprise Portal) ??

SAP NetWeaver Portal (Enterprise Portal)

SAP NetWeaver Portal is one of the building blocks in the SAP NetWeaver architecture. With only a Web Browser, users can begin work once they have been authenticated in the portal which offers a single point of access to information, enterprise applications, and services both inside and outside an organization. The Netweaver Portal also provides the tools to manage this knowledge, to analyze and interrelate it, and to share and collaborate. With its coherent interface, role-based content, and personalization features, the portal enables you to focus exclusively on data relevant to your daily decision-making processes.
Knowledge Management offers capabilities that everyone can use to distribute and access unstructured information within an organization through a heterogeneous repository landscape.
Collaboration brings users, information, and applications together to ensure successful cooperation. All collaboration tools and channels are easily accessible directly from the portal. These tools include collaboration rooms,discussion forums, instant messaging, chat, e-mail, and calendar integration.
The Portal is used for different purposes.
  • Internationalization
  • Personalization
  • Integration
  • Authorization
SAP NetWeaver Portal is the platform for running Web Dynpro applications or Dyn Page applications created by SAP or custom designed for connecting to some ERP functionality.

In short for a fresher, we can say that EP is a Portal where we can integrate different types of applications in to it.
 We have user administration for managing the users of portal.                        Read More....