Global Synchronization

It's common for an IP network to have many TCP flows—so many flows that the TCP flows make up the majority of the traffic on the network. Web, FTP, Telnet, and many other client-server applications transport their data with the TCP protocol. When these TCP flows experience a tail drop, all of the senders associated with the flows trigger retransmission at the same time. This global sy nchronization of retransmissions is an undesirable situation that can wreak havoc on the network (see "111 Effects of Global Synchronization and Slow Start").

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