Do IBM WebSphere Application Server 7.0 have a web server plugin like in version 8.5? or in WAS7 we need IIS as a web server.
To add to what Gas has pointed out, if you intend to use a web server in front of your WebSphere Application Server (WAS) deployment, installing the WAS HTTP Plugin on the web server is a requirement.
All versions of WAS have this requirement and offer a plugin for the following web servers:
The plugin itself is available on the "Supplements" image for which ever WAS bundle you're licensed for. The following document provides the appropriate WAS v7 part numbers for each OS:
Download WebSphere Application Server Version 7.0 for Windows operating systems
The "Supplements" image is Download 3 in the list, and is a two part download.
Also, here is the Plugin install parent doc from the WAS v7 Knowledge Center: