对于后者我们往往的做法是让接收方等待一段时间,或者接收方获得足够的空间容纳一个报文段或者等到接受缓存有一半空闲的时候,再通知发送方发送数据。 三、拥塞控制 网络中的链路容量和交换结点中的缓存和处理机都有着工作的极限,当网络的需求超过它们的工作极限时,就出现了拥塞。拥塞控制就是防止过多的数据注入到网络中...
1、flow control是用于控制发送方的速度，以防止导致接收方缓存溢出。2、congestion control是指在发生拥塞时控制进入网络的数据量。
flow control:用于控制发送方的速度，以防止导致接收方缓存溢出。congestion control:指在发生拥塞时控制进入网络的数据量。
A. flow control limits its rate by the size of RcvWindow, but congestion control by the traffic on the link B. congestion control limits its rate by the size of RcvWindow, but flow control by the traffic on the link C. flow control mainly is accomplished by the sender, but congestion ...
确实,背压(Backpressure)机制,又叫做 Credit-based Flow Control,是网络通信中解决流控问题的一种经典方案,它的前身就源于 TCP 滑动窗口。 这个思路特别简洁有效,后面我们会看到,基于相同的原理,这个思路适用于任何流量控制方案,在很多硬件系统和软件系统的设计中,都有它的身影。
The congestion control capability may be configured to provide congestion control for a transport flow of a transport connection, sent from a transport flow sender to a transport flow receiver, based on flow control associated with the transport flow. The transport flow may traverse a flow queue ...
主要在于连接性(Connectivity)、可靠性(Reliability)、有序性(Ordering)、有界性(Boundary)、拥塞控制(Congestion or Flow control)、传输速度(Speed)、量级(Heavy/Light weight)、头部大小(Header size)等差异。 主要差异: 1.TCP是面向连接(Connection oriented)的协议,UDP是无连接(Connection less)协议; ...
源抑制之所以被负面评价(参见 RFC896 “Congestion Control in IP/TCP Internetworks” Nagle 的评价),核心在于广域网的不确定性和异构无标准化,然而我们现在设计的是数据中心网络,而非广域网,彼时对 NACK 和源抑制负面评价时,局域网甚至连快速以太网都不是,足够就是最好,何谈优化。与此类似,SDN 不适用广域网...
Network Access Flow Control Network access flow control is aimed at throttling the external input to the network with a view toward preventing overall internal network congestion. This control is based on measurements of internal network congestion, where the measures collected may be local (e.g.,...
TCP Congestion Control and Flow Control – Sliding Windows One of the main principles for congestion control is avoidance. TCP tries to detect signs of congestion before it happens, and reduce or increase the load into the network accordingly. The alternative of waiting for congestion and then rea...