Why does IE9 opens in Document Mode as IE7 standards?

Question

When I open a webpage in IE9 with DOCTYPE as

It opens Document Mode as IE7 standards.

I need default IE9 stan

Answer 1

Just wanted to share that if your web server is Apache2 you could set the Response header like below in your VirtualHost configuration which will also resolve the issue.

Header set X-UA-Compatible "IE=edge"