The traditional technique for managing router queue in internet usually adopts first in first out ( fifo ) scheduling and " drop tail " queue management algorithms , which have no provision for the detection of incipient congestion when the queue is full Internet中傳統的路由器通常采用先來先服務的調度算法以及“棄尾”緩沖管理方法,在指示和控制擁塞方面不提供任何顯式的支持。