There are a number of ways that e-learning might be facilitated by using:

• web pages like these to make material accessible to all without a requirement to have to login to a system;
• email which is usually something that everybody has and know has to use;
• conferencing which requires some additional server software and usually a username and password;
• surveys and quizzes which need a fairly complex registration system and are usually only available within a Virtual Learning Environment (VLE);
• blogs and wikis which are much more open systems and give the user much more autonomy than VLEs;

You may be able to think of others.