Includes Round Trip Time (RTT), Hops, or Least Connections, which use active probing to find the "best" path.
These represent the BIG-IP systems (LTMs) or generic hosts within those data centers. F5 Configuring BIG-IP GTM v11 Student Guide
A collection of virtual servers that provide the same service. Includes Round Trip Time (RTT), Hops, or Least