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- Karn's_Algorithm abstract "Karn's Algorithm addresses the problem of getting accurate estimates of the round-trip time for messages when using TCP. The algorithm was proposed by Phil Karn in 1987.Accurate round trip estimates in TCP can be difficult to calculate because of an ambiguity created by retransmitted segments. The round trip time is estimated as the difference between the time that a segment was sent and thetime that its acknowledgment was returned to the sender, but when packets are re-transmitted there is an ambiguity: the acknowledgment may be a response to the first transmission of the segment or to a subsequent re-transmission. Karn's Algorithm ignores retransmitted segments when updating the round trip time estimate. Round trip time estimation is based only on unambiguous acknowledgments, which are acknowledgments for segments that were sent only once.This simplistic implementation of Karn's algorithm can lead to problems as well. Consider what happens when TCP sends a segment after a sharp increase in delay. Using the prior round trip time estimate, TCP computes a timeout and retransmits a segment. If TCP ignores the round trip time of all retransmitted packets, the round trip estimate will never be updated, and TCP will continue retransmitting every segment, never adjusting to the increased delay.A solution to this problem is to incorporate transmission timeouts with a timer backoff strategy. The timer backoff strategy computes an initial timeout. If the timer expires and causes a retransmission, TCP increases the timeout generally by a factor of 2. This algorithm has proven to be extremelyeffective in networks with high packet loss.".
- Karn's_Algorithm wikiPageID "14467781".
- Karn's_Algorithm wikiPageRevisionID "583399497".
- Karn's_Algorithm hasPhotoCollection Karn's_Algorithm.
- Karn's_Algorithm subject Category:Networking_algorithms.
- Karn's_Algorithm subject Category:Transmission_Control_Protocol.
- Karn's_Algorithm type Abstraction100002137.
- Karn's_Algorithm type Act100030358.
- Karn's_Algorithm type Activity100407535.
- Karn's_Algorithm type Algorithm105847438.
- Karn's_Algorithm type Event100029378.
- Karn's_Algorithm type NetworkingAlgorithms.
- Karn's_Algorithm type Procedure101023820.
- Karn's_Algorithm type PsychologicalFeature100023100.
- Karn's_Algorithm type Rule105846932.
- Karn's_Algorithm type YagoPermanentlyLocatedEntity.
- Karn's_Algorithm comment "Karn's Algorithm addresses the problem of getting accurate estimates of the round-trip time for messages when using TCP. The algorithm was proposed by Phil Karn in 1987.Accurate round trip estimates in TCP can be difficult to calculate because of an ambiguity created by retransmitted segments.".
- Karn's_Algorithm label "Algorithme de Karn".
- Karn's_Algorithm label "Karn's Algorithm".
- Karn's_Algorithm sameAs Algorithme_de_Karn.
- Karn's_Algorithm sameAs m.03d4hgd.
- Karn's_Algorithm sameAs Q2835797.
- Karn's_Algorithm sameAs Q2835797.
- Karn's_Algorithm sameAs Karn's_Algorithm.
- Karn's_Algorithm wasDerivedFrom Karn's_Algorithm?oldid=583399497.
- Karn's_Algorithm isPrimaryTopicOf Karn's_Algorithm.