In this article we will discuss the details steps to create web applications in SharePoint 2010. You can also check my last article on how to create a site collection in SharePoint 2010.
Step-1:
Go to Start->All Programs->Microsoft SharePoint 2010 Products->SharePoint 2010 Central Administration.
Step-4:
Then change the Name and Port ,For changing the port no need to change it at each and every place,just change at one place i.e at the option port it will reflect all.



