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- Karns_algorithm abstract "Karn's algorithm addresses the problem of getting accurate estimates of the round-trip time for messages when using the Transmission Control Protocol (TCP) in computer networking. 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 the time 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 extremely effective in networks with high packet loss.".
- Karns_algorithm wikiPageID "14467781".
- Karns_algorithm wikiPageLength "2509".
- Karns_algorithm wikiPageOutDegree "6".
- Karns_algorithm wikiPageRevisionID "650154932".
- Karns_algorithm wikiPageWikiLink Category:Networking_algorithms.
- Karns_algorithm wikiPageWikiLink Category:Transmission_Control_Protocol.
- Karns_algorithm wikiPageWikiLink Computer_network.
- Karns_algorithm wikiPageWikiLink Phil_Karn.
- Karns_algorithm wikiPageWikiLink Round-trip_delay_time.
- Karns_algorithm wikiPageWikiLink Transmission_Control_Protocol.
- Karns_algorithm wikiPageWikiLinkText "Karn's algorithm".
- Karns_algorithm wikiPageUsesTemplate Template:Page_needed.
- Karns_algorithm wikiPageUsesTemplate Template:Reflist.
- Karns_algorithm subject Category:Networking_algorithms.
- Karns_algorithm subject Category:Transmission_Control_Protocol.
- Karns_algorithm type Algorithm.
- Karns_algorithm type Protocol.
- Karns_algorithm comment "Karn's algorithm addresses the problem of getting accurate estimates of the round-trip time for messages when using the Transmission Control Protocol (TCP) in computer networking. 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.".
- Karns_algorithm label "Karn's algorithm".
- Karns_algorithm sameAs Q2835797.
- Karns_algorithm sameAs Algorithme_de_Karn.
- Karns_algorithm sameAs m.03d4hgd.
- Karns_algorithm sameAs Q2835797.
- Karns_algorithm wasDerivedFrom Karns_algorithm?oldid=650154932.
- Karns_algorithm isPrimaryTopicOf Karns_algorithm.