The Latency/Bandwidth Tradeoff in Gigabit Networks UBI 527 Data Communications Ozan TEKDUR 2011-2012, Fall. Background . Late 1960s up to 30 character per second Mid 1970s 64 kbps trunk speed 10 kbps file transfer speed X.25 packet switched networks Late 1980s cost effective T1 Networks
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The Latency/Bandwidth Tradeoff in Gigabit NetworksUBI 527 Data CommunicationsOzan TEKDUR2011-2012, Fall
Table 1: propagation delay / packet Tx time
Figure 2:Response time vs. system load with no propagation delay
Figure 3:Response time vs. system load with 15ms propagation delay
T = (1.024/c)/ (1 – p) + τ
Ccritical = (1.000b)/ (1 – p) τ(Eq.4)
Figure 4:Bandwidth vs. system load for a 1-Mb file sent across the U.S.
negligible effect in reducing
the mean response time, T
Figure 5: Bandwidth vs. system load for files sent across the U.S.
Reference: KLEINROCK, L., The Latency/Bandwidth Tradeoff in Gigabit Networks. IEEE Communications Magazine, April 1992UBI527 Data Communications Term Project 20.12.2011 Ozan TEKDUR 91090017615