Update lab3.rst

added answer to open ended question

docs/class6/module2/lab3.rst

@@ -394,14 +394,16 @@ You can also see the load balancer name and the Origin Servers to the right. If
 
 Click the **Origin Servers Tab** in the top menu and change your time-frame to **1 hour**. At the bottom left, change your setting to **50** items per page. 
 
-Why do you think there are so many Origin Servers showing for the AWS EC2 workload DNS name?
+Q: Why do you think there are so many Origin Servers showing for the AWS EC2 workload DNS name?
 
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 .. image:: ../images/originserve.png
 
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+A: The AWS site was defined in the pool using (FQDN) public DNS. Each Regional Edge is a proxy from the XC network to the public IP that the FQDN resolves to, thus each Regional Edge must know the availability of any given IP from its perspective. 
+
 Click the **Requests Tab** in the top menu and change your time-frame to **1 hour**. At the bottom left, change your setting to **50** items per page. 
 
 The request log has a wealth of information. Literally everything about the request is logged and analyzed.