Advances in Network Systems : Architectures, Security, and by Maciej Grzenda, Ali Ismail Awad, Janusz Furtak, Jaroslaw

By Maciej Grzenda, Ali Ismail Awad, Janusz Furtak, Jaroslaw Legierski

This ebook presents the reader with a accomplished choice of cutting–edge algorithms, applied sciences, and purposes. the amount bargains new insights right into a variety of essentially very important issues in community architectures, community defense, and community functions. It serves as a reference for researchers and practitioners through that includes study contributions exemplifying examine performed within the box of community platforms. moreover, the booklet highlights a number of key subject matters in either theoretical and useful facets of networking. those comprise instant sensor networks, functionality of TCP connections in cellular networks, photonic info delivery networks, safety guidelines, credentials administration, information encryption for community transmission, chance administration, dwell television companies, and multicore strength harvesting in allotted structures.

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The achievable TCP throughput can be also impacted by packet reordering [26, 27] that can be introduced for example by parallel packet processing in network devices. Receiving out-of-order segments can result in duplicate acknowledgments being sent and interpreted as data loss. This may in turn lead to unnecessary retransmissions, cwnd reduction and throughput degradation. On the receiver’s side frequent segment reordering may lead to extensive buffering and potential reduction in receiver’s window size.

1 Runtime UI Adaptation Model To be able to analyze the UI adaptation in different application architectures we have defined a simplified model of the UI adaptation and generation process, called the GARP model. The GARP model, presented in Fig. 3, is composed of four main steps: 1. Input gathering (G). At the beginning of the process it is necessary to gather all input required for UI adaptation. The result of this step is a triplet of: UI description, content and context. 2. Adaptation (A). In this step the content is used to fill-in the UI template derived from the UI description and the context is used to guide the transformation of the UI into a final UI tailored for the user, her end devices and situation.

The paper also presents selected details of its practical implementation. Keywords TCP ⋅ Data flow measurements ⋅ Performance bottlenecks 1 Introduction This work is an extended version of [1]. It presents the methodology of finding the root causes of throughput degradation in TCP connections on the base of passive measurements obtained from probes capturing traffic on the network links. Since the foundation of the Internet the vast majority of network data is transmitted using Transmission Control Protocol (TCP).

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