/mcpThe concepts applied to the bandwidth management strategy illustrated in Figure 20 include: • A self-regulating video network. • Prioritization of all audio streams throughout the network • Creation of a class of video endpoints that use available bandwidth opportunistically. The following sections describe these concepts briefly. Self-Regulating Video Network A self-regulating video network leverages intelligent media techniques and rate adaptation along with proper provisioning and QoS to allow the video endpoints to maximize their video resolution during times when video bandwidth is not fully utilized in the network and to rate adapt or throttle down their bit rate to accommodate more video flows during the busy hour of the day. Prioritized Audio Prioritized audio for both audio-only calls and audio of video calls ensures that all audio is prioritized in the network and is thus not impacted by any loss that might occur in the video queues. Prioritizing voice from all types of collaboration media ensures that, even during times of extreme congestion when video is experiencing packet loss and adjusting to that loss, the audio streams will not suffer packet loss and will enable the users to have an uninterrupted audio experience. Opportunistic Video Opportunistic video allows for a group of video endpoints to be strategically marked with a lower class of video, thus allowing them to use available bandwidth opportunistically for optimal video resolution during times when the network is less busy, and more bandwidth is available. Conversely, the lower class of video endpoints can throttle down their video bit rate more aggressively than the prioritized class of video during times of congestion when the network is in its busy hour. This concept of opportunistic video, coupled with prioritized audio, maintains an acceptable video experience while simultaneously ensuring that voice media for the opportunistic video calls is not compromised. This, of course, applies to the managed network since an unmanaged network such as the Internet is not QoS-enabled and thus provides no guarantees with regard to packet loss. Nevertheless, the media resiliency and rate adaptation