If the switch doesn't have enough of its own bandwidth available, it has to request more from other switches on the link.
如果交换器本身可资使用的带宽不够，它就须向链路上的其他交换器请求更多带宽。
In network layer link bandwidth and available bandwidth capture the relevant properties of network path, which is baseline of performance management and QoS control.
网络层的链路带宽与有效带宽直接反映了端到端路径的基本状况，是对网络进行性能管理和服务质量控制的基础。
By estimating the path capacity and available bandwidth, terminals can dynamically select the optimized accessing point, which fulfills the requirements of real time link accessing and selection.
通过对网络路径容量和可用带宽的估计，终端可以实时动态地选择最优的接入点，满足链路接入和选择的需求。
By estimating the path capacity and available bandwidth, terminals can dynamically select the optimized accessing point, which fulfills the requirements of real time link accessing and selection.
通过对网络路径容量和可用带宽的估计，终端可以实时动态地选择最优的接入点，满足链路接入和选择的需求。
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