Microsoft Application Request Routing for IIS 7

Microsoft Application Request Routing (ARR) for IIS 7 is a proxy-based routing module that forwards HTTP requests to application servers based on HTTP headers, server variables, and load Balance algorithms.ARR Version 2 is an incremental release that includes all of the features from Version 1, and adds support for disk-based Cache. ARR Version 2 can be used to: Enhance ARR Version 1 scenarios with disk cache. Use ARR as a cache proxy as a cache node in a CDN/ECN environment. Use ARR as an edge/child cache node. Use ARR as a parent cache node. The installation package includes several additional components and hotfixes required by Application Request Routing: Microsoft URL Rewrite Module Version 2 for IIS 7 Microsoft Web FARM Management Version 1 for IIS 7 Microsoft Application Request Routing Version 2 for IIS 7 Microsoft External Cache Version 1 for IIS 7 Hotfix (KB 954438)