LLTD and QoS for Media Experiences

The Link Layer Topology Discovery protocol (LLTD) operates over wired (802.3 Ethernet) and wireless (802.11) media. Any device that implements LLTD will appear on the Network Map with an icon representing the device, allowing users one-click access to the device's Web UI.

LLTD also enables quality media streaming experiences even on networks with limited bandwidth. Devices that provide audio or video playback or that are bandwidth-sensitive can implement the Quality of Service (QoS) extension to the LLTD protocol to ensure they receive prioritized streams and that changes in available bandwidth have little or no impact on the user experience.

QoS support for A/V on home IP networks is advanced through Quality Windows Audio/Video Experience (qWAVE) in Windows Vista. qWAVE-enabled applications together with devices that implement the LLTD QoS Extensions greatly improves an end user's experience of streaming video by safely and intelligently prioritizing traffic and reducing the impact of network-related transient issues.

LLTD Papers

Link Layer Topology Discovery and Enabling Wi-Fi Diagnostics for Network Performance Tuning [WinHEC 2006; 551 KB]

LLTD Specifications

Link Layer Topology Discovery Protocol

qWAVE Papers

qWAVE API Reference on MSDN

See Also

	Windows Rally Development Kit
	Quality Windows Audio-Video Experience - qWave

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