พูดง่ายๆ มันก็คือ Rewrite Module ของ IIS นั่นเองครับ ส่วนในทาง linux เขาเรียกว่า Mod Rewrite
อ้างอิง
Here are some key features of "URL Rewrite Module":
· Rules-based URL rewriting engine
· Regular expression pattern matching
· Wildcard pattern matching
· Global and distributed rewrite rules
· Access to server variables and HTTP headers
· Various rule actions including redirect and request abort.
· Support for IIS kernel mode and user mode output caching
· Lower case conversion function
· Rewrite maps to generate the substitution URL during rewriting
· Failed Request Tracing support
· Built-in rule templates
· Integrated user interface for testing regular expression and wildcard patterns
· Integrated user interface for managing rewrite rules and rewrite maps
· Integrated user interface for importing of Apache mod_rewrite rules
Requirements:
· IIS 7.0