sentences:  For Windows XP computers to appear on the "Network Map", the LLTD Responder must be downloaded and installed.Devices that provide audio or video playback or that are bandwidth sensitive can implement the "QoS Extension" part of the protocol so that they receive prioritized streams and that changes in available bandwidth have less impact on the playback experience.Windows Vista includes qWAVE, a pre-configured Quality of Service API for time dependent multimedia data, such as audio or video streams.