E-learning can also be widely coined as "online learning" or "virtual learning". E-learning can be dened as learning
facilitated and supported through the use of information and communication technology. E-learning comprises learners /
facilitators, e-learning space and resources, e-learning content, e-learning culture. Types of e-learning were e-learning with a physical presence
and without E-communication e-learning without the presence and without E-communication, asynchronous, synchronous and blended/hybridasynchronous. Blended learning combines e-learning tools with traditional classroom learning. E-learning impacts student's learning positively
increasing exibility, improving efciency, learning in a informal way , making digital study convenient, helping in better communication and
better management. E-learning tools used are e mail, audio chat, online forum, web, video conference. Open source e-learning applications is a
program in which the source code is available to the general public .Open source software includes efront, moodle , google class room,
mentimeter, kahoot, dokeos, caroline , ilias, olat, sakai project etc. Soft ware platform for assessment includes proprofs ,google forms ,exam
soft, read n quiz, ed base, socrative , virtualx , easy LMS, mercermetti , edmado , testmos Different technological trends of learning includes
mobile Learning , micro Learning , internet of things (IoT) , cloud based e-Learning ,simulation , games, gamication ,adaptive e-learning ,
augmented reality , video e-learning ,beacon e-learning ,articial intelligence: SIRI and VIV, google glass .Technologies for audio-visual
communication are face Time ,skype , ooVoo , google hangouts, zoom, talky, cisco eebEx, go to webinar, ezTalks, adobe connect, google Meet,
microsoft team, discussion forums , eE-mail ,social media sites ,texting and messaging apps , net-etiquette . Challenges and issues in e-learning
to be addressed as e-learning is an innovative approach for delivering well-designed, learner-centered, interactive, and facilitated learning
environment.