HTML is served from Server 22 (172.16.70.22:80)
Client IP address: 172.16.10.190:56754
X-Forwarded-For is: 216.73.216.119
This web page is comprised of a number of different elements. First, there's the HTML that presents the whole page. There are graphical elements, too, in the form of some JPG and PNG images. The page layout is controlled with a cascading style sheet (CSS). If a cookie was passed to your browser from the application, a Javascript will trigger that allows you to view it.
Since the BIG-IP is utilizing a Full Proxy Architecture, each of these elements are requested from the client to the BIG-IP system, and then from the BIG-IP system to the back end servers, resulting in many connections to deliver the entire page contents. These connections are load balanced across the available pool members associated with the virtual server you connected to.
The page contents shows you which server (pool member) some of the elements were served from. For example, the HTML was served from the pool member at 172.16.70.22:80. Some of the graphics display the last octet of the server they came from. The client's IP address, as seen by the server, is also displayed (172.16.10.190).
The background color of the webpage is also based on the protocol being used. Blue means you're connected to the HTTP web page and red means you're connected to the HTTPS web page.
When you go through each lab and change various settings on your virtual server and pool configurations, some of the values shown here may also change.