F5 : DNS WORKING : FIVE STEPS !!

=======================
Step 1 : DNS Listener 
=======================
Client request received to DNS listener on port 53
=======================
Step 2 : Wide IP Checked
=======================
DNS checks if received URL matches with Wide IP list available
=======================
Step 3 : Pool Selection 
=======================
Once Wide IP matches, then eligible Pool is selected
=======================
Step 4 : Virtual Server Selection 
=======================
Once Pool is selected, then eligible Virtual server is selected
=======================
Step 5 : IP Address Details
=======================
IP Address of eligible Virtual Sever is passed onto client as a DNS resolution
=======================
SUMMARY
=======================
Client Request >> DNS Listener >> Wide IP checked >> Pool Selected >> Virtual Server Selected >> Virtual Server IP returned as DNS Resolution
=======================