China
Africa
Explore chapters and articles related to this topic
Fault-Tolerant Avionics
Published in Cary R. Spitzer, Uma Ferrell, Thomas Ferrell, Digital Avionics Handbook, 2017
Multiprocessing architectures consisting of computing resources interconnected by external data buses should be designed as a distributed fault-tolerant system (Best et al., 1988). The computing resources may be installed in an enclosure using a parallel backplane bus to implement multiprocessing within the enclosure. Each enclosure can be considered a virtual node in the overall network. A network operating system, coupled with the data buses and their protocol, completes the fault-tolerant distributed system. The architecture can be asynchronous, loosely synchronous, or tightly synchronous. Maintaining consistency of data across redundant channels of asynchronous systems is difficult (Papadopoulos, 1985).
Network Communication
Published in Jerry C. Whitaker, Microelectronics, 2018
On a typical LAN, a networked PC would send a request for printing out onto the network through a network interface card. The networked request for printing services would be accepted by a device in charge of organizing the print requests for a networked printer. Depending on the LAN implementation configuration, that device may be a PC with attached printer, a specialized print server with attached printers, or a directly networked printer. Some type of software must manage all of this requesting, spooling, buffering, queuing and printing. The required software may be part of an overall network operating system or may be specifically written for only network printer management.
Distributed and Parallel Computing
Published in Sunilkumar Manvi, Gopal K. Shyam, Cloud Computing, 2021
Sunilkumar Manvi, Gopal K. Shyam
Network operating system runs on serverevery system in the networkboth (a) and (b)None of the above
Virtual earth cloud: a multi-cloud framework for enabling geosciences digital ecosystems
Published in International Journal of Digital Earth, 2023
Mattia Santoro, Paolo Mazzetti, Stefano Nativi
Web APIs stem from the notion of APIs, which (Shnier 1996) defines ‘the calls, subroutines, or software interrupts that comprise a documented interface an application program can use the services and functions of another application, operating systems, network operating system, driver, or another low-level software program’. From a software engineering point of view, APIs constitute the interfaces of the various building blocks that a developer can assemble to create an application (Santoro et al. 2019; Vaccari et al. 2021). The expression Web APIs indicates the APIs operating over the Web. In the reminder of this paper, the terms Web APIs and APIs are used generically to refer to the mechanisms an enterprise system implements to expose its resources and functionalities on the Web.
Virtualised Environment for Learning SDN-based Networking
Published in IETE Journal of Education, 2020
Oscar Polanco, Fabio G. Guerrero
In SDN, the control software is hosted on a centralised logical server (SDN controller). This means only the controller must be updated to add new functions. The network operating system generates a model of the networking devices with their default flow tables. In addition, control programmes can be written to better understand a model. The programmes then modify the model, which in turn is interpreted by the operating system and issued as orders to the networking devices. It is possible to manipulate the network model at a high level because of the virtualisation layer between the control programme and the operating system, which allows centralised traffic engineering. Furthermore, network restoration time in case of a failed link can be made more predictable. SDN also facilitates better decision making because the controller knows the complete status of the network. To prevent the network from having a single point of failure, the servers where the drivers (or controllers) are located may be duplicated. For the SDN controller to communicate with the switches, it is necessary to have a practical network in place, such as a conventional IP network.
Software-Defined Networking Techniques to Improve Mobile Network Connectivity: Technical Review
Published in IETE Technical Review, 2018
In the most commonly used SDN technology, OpenFlow comes with an unavoidable challenge, which is compatibility issue. This is mainly due to the fact that network operating system supports only specific OpenFlow specification and may encounter problem of interoperability issue such that older version does not support new version's feature. This has direct impact on the software installed on device, where some features cannot be used in some devices, hence, causing unexpected problem. Thus, devices’ software is required to be updated from time to time to ensure that they meet the requirement of new specifications. Updating software in devices may also cause an issue to hardware vendor, as the new software may require fine tuning in hardware itself in order to support new features that come with the new specification. Hence, standardization of protocol is required for deployment over various domains such as different service provider in order to ensure that communication is possible between hosts in these domains.