3. Elements of E-learning (EL) System
Depending on the above essentialities number of architectures has been proposed for EL from time to time.
Among those the framework given by Islam et al. (2011) [9] clearly describes the EL environment divided into three
layers with nine different functional components. The integration of web services with these components can lead
the society for the successful implementation of virtual learning environment (VLE) where continuous flow of
knowledge can improve the learning environment with the hope to create a KS. The components are described as
follows: