拥塞控制算法主要分为两部分：在端系统上使用的源算法和在网络设备上使用的链路算法。
The congestion control algorithm mainly divides into two parts: source algorithm which USES on the end system and the link algorithm which USES on the network equipment.
由于TCP端到端的本质，拥塞控制的源算法无法利用网络中的具体信息进行理想地拥塞控制。
Due to the end-to-end essence of TCP, the source algorithm of congestion control can't acquire enough information of intermediate network to control traffic ideally.
拥塞控制理论和算法是网络研究的重点问题之一。
The theory and algorithm of congestion control is one of the key topics in the network studies.
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