Application Pool

Isolation level IIS

1. Low Isolation level IIS – All web sites are working in a single process

2. Medium Isolation level IIS – Two process one is for IIS and another for all websites.

3. High Isolation level IIS – IIS and Each Websites a

Application pool is a new concept in IIS 6.0.

To achieve high isolation level in IIS the concept of application pool is using.

Each application pool will work in a different process. So we can select different application pools for each websites or web process so that it will work on different process.

Each process has an identity in OS.

Each application pool also has identity. This we can change in identity tab in the application pool property. There is preferred list( Network Service, Local System & Local Service). Network service is preferable if we are going to use any cross site resources.

Also we can assign any user name. But the user should be in the IIS_WPG user group.