In case the low-power-mode device is communicating via Wi-Fi, the wake-up-packet is sent via Wireless Multimedia Extensions (WMM).
Windows Vista supports the Wireless Multimedia (WMM) profile classes for QoS in wireless networks as certified by the Wi-Fi Alliance: BG (for background data), BE (for Best Effort non real time data), VI (for real time videos) and VO (for real time voice data).
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