It's a set of automated rules that control network congestion. 这是一组控制网络拥挤程度的自动规则。
But as these flat networks scale upward, the volume of broadcast traffic increases and network congestion and performance degradation results. 但当这些简单网络向上扩大时,广播信息流的数据量就增大,从而产生网络拥挤和性能下降。