Devices do not wake up when in a shutdown state and the WOL command is sent.
The "Wake on LAN" (WOL) feature wakes a computer from a low-power state when a network adapter detects a WOL event. Typically, such an event is a specially constructed Ethernet packet. The default behavior in response to WOL events has changed from Windows 7 to Windows 8.
Devices (Machines) running Windows 8 or 8.1 can be woke up if it is in a hibernation or sleep state. Do not completely shutdown devices if WOL is needed.
Helpful WOL articles:
Video (Run time 54 minutes):KACE K1000 - Wake-On-LAN…How does that work.