How does SCCM determine if a workstation needs to be powered on via WoL? Lets say you have an advertisement to install something on 30 computers in a collection. Some of these workstations are powered on and others are off. How does SCCM determine if a workstation needs to be woken up via WoL for an advertisment that is fully enable for WoL? Does SCCM send out WoL packets to the whole collection? Therefore the magic packets are dropped by the powered on workstations or does SCCM have a process to determine the power state of a workstation before sending out the magic packets?

ConfigMgr does not check the power state before sending out the WoL packages. It just sends out the package to the members of the collection.