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Middleboxes in private networks have been known to change packets in many ways, making it hard to design protocol extensions that work for the large majority of Internet users. Addressing the need to know what such middleboxes do, we introduce a tool called fling ("flexible ping"). fling can carry out (almost) any kind of protocol dialogue between a server and a client based on a simple...
Given the mice-elephant phenomenon (where 80% of flows in number contribute to only 20% of traffic in volume) of TCP traffic, TCP's slow-start algorithm plays an important role in today's Internet. Designed to slowly probe the network for available bandwidth, the current standard mandates TCP flows to start with an initial window (IW) size of at most ten segments. Given the speed of the today's networks,...
One of the main goals of multipath TCP (MPTCP) is to achieve higher throughput than regular TCP by utilizing multiple paths simultaneously. When these paths share a common bottleneck, MPTCP tries not to be more aggressive than a regular TCP flow. This is achieved by MPTCP's coupled congestion control mechanism that couples the increase factor of MPTCP's subflows in congestion avoidance. However, slow-start...
In the light of the mice-elephant phenomenon of the Internet traffic, TCP congestion control algorithm shows unfairness against flows of small sizes (small flows). In this context, we find it motivating to study the influence of TCP's initial window (IW) size on the response times of small flows. In our previous works, we proposed a function that determines IW-size for each flow based on its size;...
Recognizing the upper bound of TCP initial window (IW) size—four segments—too small, researchers have been proposing to increase this. In this context, we observed that given the mice-elephant phenomenon, small flows benefit more from larger IW-size than large flows. This work proposes a simple but effective function to set IW-size for each flow, and investigates a scenario where the decentralized...
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