Hi Saleem,
J2EE Connector architecture (J2C) authentication alias can be used to provide the credentials required for access to systems like Databases, Queue Manager (MQ), Mail providers,....is a way to configure a user/password in Websphere and then link with the connector (datasource, connection factory,....)
For example when you configure a Datasource, you can create a J2C authentication alias to be used by this datasource to connect to database.
For learning websphere:
The oficial path:
New to WebSphere
www.ibm.com/developerworks/websphere/new... I think that you can start with education is free and very good starting point:
publib.boulder.ibm.com/infocenter/ieduas... Also have the all the information of the products in infocenters:
www-01.ibm.com/support/docview.wss?uid=s... Redbooks (practical approach to products, with examples and screens):
www.redbooks.ibm.com/portals/websphere For technical articles:
www.ibm.com/developerworks/websphere/ For support:
www-947.ibm.com/support/entry/portal/Ove... and for questions and so on...Global WebSphere Communitty, linkedind, facebook, ....
hope this helps.
Regards