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Integrating realistic behavior of end systems into simulations is challenging since the mechanisms used in protocols and applications such as Transmission Control Protocol (TCP) are complex and continuously evolving. In this paper, we present VMSimInt, a new approach which allows the INTegration of arbitrary Operating Systems (OSs) and application code into(More)
Explicit Congestion Notification (ECN) is a TCP/IP extension that can avoid packet loss and thus improve network performance. Though standardized in 2001, it is barely used in today's Internet. This study, following on previous active measurement studies over the past decade, shows marked and continued increase in the deployment of ECN-capable servers, and(More)
Multipath TCP (MPTCP) is an experimental protocol currently under standardization in the IETF. MPTCP allows to use multiple TCP connections for one data transmission if at least one of the endpoints is multi-homed. For example, this can be a mobile device with a Wifi and a 3G interface. It is assumed that the paths are disjoint or partly disjoint. As such(More)
Explicit Congestion Notification (ECN) is an TCP/IP extension to signal network congestion without packet loss, which has barely seen deployment though it was standardized and implemented more than a decade ago. Ongoing activities in research and standardization aim to make the usage of ECN more beneficial. This measurement study provides an update on(More)
Data Center TCP (DCTCP) is an Explicit Congestion Notification (ECN)-based congestion control and Active Queue Management (AQM) scheme. It has provoked widespread interest because it keeps queuing delay and delay variance very low. There is no theoretical reason why Data Center TCP (DCTCP) cannot scale to the size of the Internet, resulting in greater(More)
The original version of this article unfortunately contained a mistake in the presentation of the formula on page 116. The corrections are given below: 1) Instead of " CWND = T current_RT TARGET × CWND " , it should read " CWND = (1 – T current_RT TARGET) × CWND " 2) The line above the formula " Thus β must be T current_RT TARGET. " should read " Thus the(More)
Network operators increasingly rely on the use of in-network functionality provided by middleboxes to make their networks manageable and economically viable. These mid-dleboxes make end-to-end paths through the Internet more opaque, by making assumptions about the traffic passing through them. This in turn leads to ossification of the Inter-net protocol(More)