Comparative analysis of models and platforms for the e-learning portals

The main basic functions of portal systems have to be implemented by the functionality of it platform. The technological platform of portal should be complied with the specified requirements. The basic set of services and components of e-learning portal contains five components for: services performance, user services, data management, portal adaptors, web infrastructure. The paper presents the detailed outcomes of well-known platforms analysis, discusses the advantages and disadvantages of mentioned systems and gives recommendations for customers in making a choice among these platforms.