navigator.appName inconsitent behavior in IE11

Hi, 

I work as an web application developer.  I observed IE11 shows navigator.appName differently with different URLs . 

1) It shows as "Netscape" when i try to verify through Developer Console for a google.com.

2) It shows as "Microsoft Internet Explorer" when i try to access our web application which is deployed in weblogic in Linux OS. 

3) It shows as "Netscape" when i try to access our local web application which is deployed in my local weblogic domain ( ie., in weblogic in Windows 7) 

4) It shows as "Netscape" when i try to access our web application which is deployed in weblogic in AIX OS.  But it some times changes to "Microsoft Internet Explorer" for few sessions. 

I would like to understand why there is an inconsitent behavior in IE11??

I didnt see this issue in IE8

The version of IE11 which i had is .  11.0.9600.17420

Please advise