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Distributed applications deployed in multi-datacenter environments need to deal with network connections of varying quality, including high bandwidth and low latency within a datacenter and, more recently, high bandwidth and high latency between datacentres. In principle, for a given network connection, each message should be sent over the best available network protocol, but existing middlewares...
The article is focused on analysis of Tactical Data Links deployment within the Czech Armed Forces according to a Federated Mission Networking (FMN) Spiral 2 Specification based on its candidate draft meant for endorsement by the FMN Management Group by the end of 2017. At the beginning the article briefly describes the Tactical Data Links and FMN concept itself. Then, in line with purpose of the...
In this paper, we consider the possibility of hidden data. Since today all network services rely on the basic protocols, the use of data transmission capacities are not taken into account, untestable and redundant fields may become a big problem. All of the modern data protocols have vulnerabilities. An attacker can use the reserved fields or field use undocumented way. Regarding the mechanism of...
We describe our experience over the past five years with building more robust distributed systems and network protocols by using adversarial testing and behavioral analysis. We describe the benefits and disadvantages of both approaches and the design of the tools we have built (Turret, Turret-W, SNAKE, and Chiron). We discuss how we applied them to byzantine-resilient state machine replication, wireless...
The notion of Software-Defined Networking (SDN) has already been introduced into cloud datacenter networks for provisioning virtual network environment. Network virtualization of today is generally achieved by L2-in-L3 tunneling protocols like VXLAN (Virtual eXtensible LAN) and NVGRE (Network Virtualization using Generic Routing Encapsulation) in public cloud datacenters. Some leading production packages...
This paper compares two telecommunication standards for plaintext transmission over Session Initiation Protocol (SIP): SIP extension for Text over Internet Protocol (ToIP) and SIP extension for Instant Messaging (IM). ToIP provides a real-time text service, while IM provides a near realtime text service. Originally, SIP is a Voice over Internet Protocol (VoIP) call signaling protocol that uses Real-time...
Interplanetary Network defines the architecture and protocols necessary to permit inter-operation of the Internet residents or systems on earth/spacecrafts with other remotely located Internet resident/systems on other systems/spacecrafts in transit in the hostile and unpredictable environment of space. Inter-networking in such environment requires new techniques other than traditional communication...
Bandwidth aggregation is a popular research topic that enables users to use different kind of network interfaces connected with Internet together. This is very useful especially in modern smart phones, where multiple interfaces can be used not only to aggregate bandwidth, but also to use an uninterrupted network connection. For different reasons, service providers may not be able to provide service...
SCTP (Stream Control Transmission Protocol) has multi-homing features, but SCTP implementations do not actively use this feature. If the active path is disabled or packets are lost SCTP uses alternative paths; this multi-homing feature can be used to transfer data concurrently. In this study, data has been sent from these multi-homing paths and load balancing has been implemented on these paths, with...
The Distributed Network Protocol (DNP) is the communication protocol standard for Electric Power Systems (EPS) and it is a promising communication standard for the Electric Intelligent Devices (IEDs) found in Smart Grids. This paper presents a hardware implementation of the Data Li nk layer specified in version 3.3 of DNP (DNP3). A 100 Mbps Ethernet-based Distributed Network Protocol has also been...
This paper puts forth a straw man proposal for future diverse internets. Guided by a principle that we call Align-and-Decouple (AD), our AD protocol architecture design calls for lightweight transport protocols that allow for decoupled operation of networks that are either owned by different organizations, or are networks of different types/protocols. TCP's fragmentation and congestion control mechanisms...
FPGA-CF is an open-source, portable, extensible communications package that consists of a small hardware core (less than 600 slices) and and a host-software library/API. It enables a host PC to transmit data at 120 Mb/s to Xilinx-based FPGA boards via Ethernet using standard internet protocols. The hardware core is directly connected to the Xilinx internal configuration port (ICAP) and supports all...
Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Internet,...
The relocation of live, running virtual machines from one physical host to another is a new and very desirable function because it provides a variety of features, including resilience to failures and flexibility of location. The data transfers required for live migration are supported in several commercial products by a protocol called iSCSI (Internet SCSI), which runs on top of TCP. We thoroughly...
Disruption-tolerant networks (DTNs) are groups of network assets connected with a suite of communication protocol technologies designed to mitigate the effects of link delay and disruption. Application of DTN protocols to diverse groups of network resources in multiple sub-networks results in an overlay network-of-networks with autonomous data routing capability. In space environments where delay...
As networks and data transmission are becoming increasingly important for computational science, we are working on developing a visualization application that uses high-speed networks to aid scientists in their scientific exploration. However, we have identified a major issue in the performance of data transmission when rate-based UDP is used in parallel from multiple senders to a single receiver...
Today's laptops and mobile terminals are equipped with several network interfaces belonging to different access technologies. Users can benefit from multi-homing to access network services anywhere, at any time and from any network. Multipath TCP (MPTCP) is a modified version of Transmission Control Protocol (TCP) which allows a TCP connection to simultaneously send data over multiple paths. One of...
In today's Internet age, web-based applications are an extremely logical way to disseminate, update, and visualize information. Our modern wired infrastructure and high-speed wireless access points make it possible to access high-bandwidth demanding applications from nearly everywhere. However, in places where infrastructure does not exist, and where information needs to be disseminated over areas...
This paper describes a design of network remote control based on Ethernet controller RTL8019AS and FPGA chip EP3C25Q240C8N. It's through the Altera NIOS II soft-core processor and a simplified TCP/IP protocol LWIP to complete the Ethernet Communication Protocol, and FPGA can configure and control RTL8019AS. Then the information can be communication between FPGA and PC, in order to achieve network...
Nowadays energy-saving represents a mandatory requirement for building. Several efforts have been done both to reduce energy consumption and to promote alternative generation sources. By the way, in most of the existing systems these two faces of energy-conservation are managed in isolation. In this paper, we propose a novel holistic vision for a smart home environment, in which energy administration...
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