Data and Computer Communications Chapter 18 – Internet ProtocolsChapter 18 – Internet Protocols.
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Transcript of Data and Computer Communications Chapter 18 – Internet ProtocolsChapter 18 – Internet Protocols.
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Data and Computer Communications
Chapter 18 – Internet Protocols
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Data and Computer Communications
Chapter 19 – Internetwork Operation
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Data and Computer Communications
Chapter 20 – Transport Protocols
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Retransmission Timer Management
1K
1i
)i(RTT1K
1)1K(ARTTSimple averaging method
)1K(RTT1K
1)K(ARTT
1K
K)1K(ARTT
Exponential average
)1K(RTT1)K(SRTT)1K(SRTT Smoothed round-trip time estimate
Retransmission timeout
constanta is ,)K(SRTT)1K(RTO
RTT variance estimation (Jacobson’s algorithm))1K(RTTg)K(SRTT)g1()1K(SRTT
)K(SRTT)1K(RTT)1K(SERR
)1K(SERRh)K(SDEV)h1()1K(SDEV
)1K(SDEVf)1K(SRTT)1K(RTO
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