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- TCP_global_synchronization abstract "TCP global synchronization in computer networks can happen toTCP/IP flows during periodsof congestion because each sender will reduce their transmission rate at the sametime when packet loss occurs.Routers on the Internet normally have packet queues, to allow them to hold packets when the network is busy, rather than discarding them.Because routers have limited resources, the size of these queues is also limited. The simplest technique to limit queue size is known as tail drop. The queue is allowed to fill to its maximum size, and then any new packets are simply discarded, until there is space in the queue again.This causes problems when used on TCP/IP routers handling multiple TCP streams, especially when bursty traffic is present. While the network is stable, the queue is constantly full, and there are no problems except that the full queue results in high latency. However, the introduction of a sudden burst of traffic may cause large numbers of established, steady streams to lose packets simultaneously. TCP has automatic recovery from dropped packets, which it interprets as congestion on the network (which is usually correct). The sender reduces its sending rate for a certain amount of time, and then tries to find out if the network is no longer congested by increasing the rate again subject to a ramp-up. This is known as the slow-start algorithm.Almost all the senders will use the same time delay before increasing their rates. When these delays expire, at the same time, all the senders will send additional packets, the router queue will again overflow, more packets will be dropped, the senders will all back off for a fixed delay... ad infinitum.This pattern of each sender decreasing and increasing transmission rates at the same time as other senders is referred to as "global synchronization" and leads to inefficient use of bandwidth, due to the large numbers of dropped packets, which must be retransmitted.This problem has been the subject of much research. The consensus appears to be that the tail drop algorithm is the leading cause of the problem, and other queue size management algorithms such as Random Early Detection (RED) and Weighted RED will reduce the likelihood of global synchronization, as well as keeping queue sizes down in the face of heavy load and bursty traffic.".
- TCP_global_synchronization wikiPageExternalLink faster.html.
- TCP_global_synchronization wikiPageExternalLink F3_1.HTM.
- TCP_global_synchronization wikiPageID "2072054".
- TCP_global_synchronization wikiPageRevisionID "571062131".
- TCP_global_synchronization hasPhotoCollection TCP_global_synchronization.
- TCP_global_synchronization subject Category:Internet_Standards.
- TCP_global_synchronization subject Category:Internet_architecture.
- TCP_global_synchronization type Abstraction100002137.
- TCP_global_synchronization type InternetStandards.
- TCP_global_synchronization type Measure100033615.
- TCP_global_synchronization type Standard107260623.
- TCP_global_synchronization type SystemOfMeasurement113577171.
- TCP_global_synchronization comment "TCP global synchronization in computer networks can happen toTCP/IP flows during periodsof congestion because each sender will reduce their transmission rate at the sametime when packet loss occurs.Routers on the Internet normally have packet queues, to allow them to hold packets when the network is busy, rather than discarding them.Because routers have limited resources, the size of these queues is also limited. The simplest technique to limit queue size is known as tail drop.".
- TCP_global_synchronization label "TCP Global Synchronization".
- TCP_global_synchronization label "TCP global synchronization".
- TCP_global_synchronization sameAs TCP_Global_Synchronization.
- TCP_global_synchronization sameAs m.06k6h3.
- TCP_global_synchronization sameAs Q2383755.
- TCP_global_synchronization sameAs Q2383755.
- TCP_global_synchronization sameAs TCP_global_synchronization.
- TCP_global_synchronization wasDerivedFrom TCP_global_synchronization?oldid=571062131.
- TCP_global_synchronization isPrimaryTopicOf TCP_global_synchronization.