Wide-IP is a Fully-Qualified Domain Name (FQDN) to get the application URL, which is a web application hosted on a group of web servers, such as Apache or IIS. BIG-IP DNS resolves queries to define wide-IP FQDN association with a virtual server (VIP) from a GSLB pool that has two virtual servers at each site.

The load-balancer pool algorithms for the LTM virtual server and BIG-IP DNS virtual server are not the same, and the LTM virtual server load-balancer algorithm is chosen by the user from a drop-down field. The BIG-IP DNS GSLB pool algorithm is defined on user input. There are three kinds of GSLB pool algorithms that were chosen for the LBaaS design: global delivery, ratio, and round robin.