Component Purpose
Web.config Allow/Deny tags Control access to site folder
Login controls Automate typical login activities
Security providers Centralize code for performing security activities
Security Provider attributes Customize provider activities
MembershipUser class Provide access to user information from code
RoleProvider class Supports role-based security

Table 1 Drill Down on Security Controls.
ASP.NET 2.0 ships with several components that provide you with meaningful control over your ASP.NET apps, although you will probably want to cherry-pick the functionality you need, rather than take everything all these controls provide out of the box. This article explains how to pick and choose the functionality you need to integrate these controls to the extent your needs demand.