Datakommunikation og computernetværk

This edited collection provides an alternative discourse on cities evolving with physically and virtually networked communities¿the ¿digital polis¿¿and offers a variety of perspectives from the humanities, media studies, geography, architecture, and urban studies. As an emergent concept that encompasses research and practice, the digital polis is oriented toward a counter-mapping of the digital cityscape beyond policing and gatekeeping in physical and virtual gated communities. Considering the digital polis as offering potential for active support of socially just and politically inclusive urban circumstances in ways that mirror the Greek polis, our attention is drawn towards the interweaving of the development of digital technology, urban space, and social dynamics. The four parts of this book address the formation of technosocial subjectivity, real-and-virtual combined urbanity, the spatial dimensions of digital exclusion and inclusion, and the prospect of emancipatoryand empowering digital citizens. Individual chapters cover varied topics on digital feminism, data activism, networked individualism, digital commons, real-virtual communalism, the post-family imagination, digital fortress cities, rights to the smart city, online foodscapes, and open-source urbanism across the globe. Contributors explore the following questions: what developments can be found over recent decades in both physical and virtual communities such as cyberspace, and what will our urban future be like? What is the ¿digital polis¿ and what kinds of new subjectivity does it produce? How does digital technology, as well as its virtuality, reshape the city and our spatial awareness of it? What kinds of exclusion and cooperation are at work in communities and spaces in the digital age? Each chapter responds to these questions in its own way, navigating readers through routes toward the digital polis.Chapter "Introduction - The digital polisand its practices: Beyond gated communities" is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.

This book includes original unpublished contributions presented at the International Conference on Data Analytics and Management (ICDAM 2021), held at Jan Wyzykowski University, Poland, during June 2021. The book covers the topics in data analytics, data management, big data, computational intelligence, and communication networks. The book presents innovative work by leading academics, researchers, and experts from industry which is useful for young researchers and students.

Dieses Open-Access-Buch befasst sich mit den gesellschaftlich und wirtschaftlich weitreichenden Potenzialen von ¿Big Data in der Mobilität¿. Zunächst werden der Mobilitätsmarkt mit seinen Akteuren sowie deren Interessen und oft paradoxen Verhaltensweisen vorgestellt sowie eine ¿Mobilitäts-Datenkarte¿ abgeleitet. Darauf aufbauend werden auf Basis mehrerer empirischer Studien die Chancen und Risiken der Datenerhebung und deren Nutzung für neue Geschäftsmodelle und das Gemeinwohl, nicht zuletzt den Klimaschutz, analysiert. Daraus werden Nutzenpotenziale ¿für die Welt von morgen¿ abgeleitet und die notwendigen politischen und gesellschaftlichen Voraussetzungen skizziert. Ein Ausblick auf die Zukunft der Mobilität und Implikationen für betroffene Branchen ¿ am Beispiel der Versicherungswirtschaft ¿ runden das Buch ab.

This book provides an overview about the open challenges in software verification. Software verification is a branch of software engineering aiming at guaranteeing that software applications satisfy some requirements of interest. Over the years, the software verification community has proposed and considered several techniques: abstract interpretation, data-flow analysis, type systems, model checking are just a few examples. The theoretical advances have been always motivated by practical challenges that have led to an equal evolution of both these sides of software verification. Indeed, several verification tools have been proposed by the research community and any software application, in order to guarantee that certain software requirements are met, needs to integrate a verification phase in its life cycle, independently of the context of application or software size. This book is aimed at collecting contributions discussing recent advances in facing open challenges in software verification, relying on a broad spectrum of verification techniques. This book collects contributions ranging from theoretical to practical arguments, and it is aimed at both researchers in software verification and their practitioners.

This book constitutes the refereed proceedings of the 25th International Computer Symposium on New Trends in Computer Technologies and Applications, ICS 2022, which took place in Taoyuan, Taiwan, in December 2022. ICS is one of the largest joint international IT symposia held in Taiwan. Founded in 1973, it is intended to provide a forum for researchers, educators, and professionals to exchange their discoveries and practices, and to explore future trends and applications in computer technologies. The biannual symposium offers a great opportunity to share research experiences and to discuss potential new trends in the IT industry.The 58 full papers and one invited paper presented in this volume were carefully reviewed and selected from 137 submissions. The papers have been organized in the following topical sections: Invited Paper; Algorithms, Bioinformatics, and Computation Theory; Cloud Computing and Big Data; Computer Vision and Image Processing; Cryptographyand Information Security; Electronics and Information Technology; Mobile Computation and Wireless Communication; Ubiquitous Cybersecurity and Forensics.

Understand the world of modern network automation with Go and deepen your knowledge with insights from 10+ experts who have real-world hands-on experience with network automation and/or are using Go for network-related tasksKey FeaturesA comprehensive guide to the world of modern network automationUse Go to build anything from repetitive task automation to complex distributed systemsOver 30 practical, ready-to-use sample programsBook DescriptionGo's built-in first-class concurrency mechanisms make it an ideal choice for long-lived low-bandwidth I/O operations, which are typical requirements of network automation and network operations applications. This book provides a quick overview of Go and hands-on examples within it to help you become proficient with Go for network automation. It's a practical guide that will teach you how to automate common network operations and build systems using Go. The first part takes you through a general overview, use cases, strengths, and inherent weaknesses of Go to prepare you for a deeper dive into network automation, which is heavily reliant on understanding this programming language. You'll explore the common network automation areas and challenges, what language features you can use in each of those areas, and the common software tools and packages. To help deepen your understanding, you'll also work through real-world network automation problems and apply hands-on solutions to them. By the end of this book, you'll be well-versed with Go and have a solid grasp on network automation.What you will learnUnderstand Go programming language basics via network-related examplesFind out what features make Go a powerful alternative for network automationExplore network automation goals, benefits, and common use casesDiscover how to interact with network devices using a variety of technologiesIntegrate Go programs into an automation frameworkTake advantage of the OpenConfig ecosystem with GoBuild distributed and scalable systems for network observabilityWho this book is forThis book is for all network engineers, administrators, and other network practitioners looking to understand what network automation is and how the Go programming language can help develop network automation solutions. As the first part of the book offers a comprehensive overview of Go's main features, this book is suitable for beginners with a solid grasp on programming basics.Table of ContentsIntroductionGo BasicsGetting Started with GoNetworking (TCP/IP) with GoNetwork AutomationConfiguration ManagementAutomation FrameworksNetwork APIsOpenConfigNetwork MonitoringExpert InsightsAppendix: Building a Testing Environment

Global surveys from McKinsey, BCG, Gartner, and others show that less than 30% of digital transformation programs succeed in their missions to improve a company¿s performance and employee productivity. This is due to the fact that IT efforts within the company do not center around the employee. This book will provide concrete steps to allow both IT professionals and business leaders to transform the way they deliver IT to employees ¿ with the employee (the human) centered in their transformation.The concepts, models, checklists, and playbook you'll review are based on the author's many years of experience, lessons learned, and proven outcomes. IT organizations want to improve their employee experience but don¿t know how and this is the ¿must have¿ book for those who don¿t know where to start. More than two-thirds of today¿s jobs require good digital and IT skills from employees. The expectations of management, who invest in these big digital transformations, is that the employees will become more productive, effective and help the bottom line. However, this can only happen through active and proactive change of IT operations and transformations that center the employee, rather than technology or senior management. This book reveals the benefit of moving towards an approach where employees gain technology aptitude, are up for technology change, and are willing to learn more for their benefit and even provide feedback on ways to improve these tools, trainings and support. You'll see how employee engagement and experience research, concepts, and implementations are growing rapidly across many organizations and taking a key role in their global strategies. Employee-centric IT will transform employees to own their digital literacy and development, and this in turn reduces or even eliminates the shadow IT need and allows the organization to drive and implement successful digital transformation.What You'll LearnUnderstand the value of being employee-centric in IT departments versus current modelsTake steps to win IT team¿s acceptance of the changes needed to achieve employee-centricityBe proactive in providing training & information on digital & productivity toolsWho This Book Is ForBusiness leaders, IT and digital leaders as well as IT employees who would like to transform their current IT and Digital teams to be more employee centric and drive highest level of value, adoption and satisfaction for their IT/digital programs, transformations and investment.

Unlock the power of automated network testing with the Cisco pyATS framework.Written by industry experts John Capobianco and Dan Wade, Cisco pyATSNetwork Test and Automation Solution is a comprehensive guide to the Cisco pyATS framework, a Python-based environment for network testing, device configuration, parsing, APIs, and parallel programming.Capobianco and Wade offer in-depth insights into the extensive capabilities of pyATS and the pyATS library (Genie). You'll learn how to leverage pyATS for network testing, including software version testing, interface testing, neighbor testing, and reachability testing. You'll discover how to generate intent-based configurations, create mock devices, and integrate pyATS into larger workflows using CI/CD pipelines and artificial intelligence. You'll explore the pyATS Blitz feature, which introduces a low-code no-code approach to network testing by allowing you to configure devices and write test cases using YAML, much like Ansible. And you'll learn how to reset devices during or after testing with the pyATS Clean feature, build a pyATS image from scratch for containerized application deployment, and much more.Whether you're a network professional, software developer, or preparing for the Cisco DevNet Expert Lab exam, this book is a must-have resource.Understand the foundations of NetDevOps and the modern network engineer's toolkitInstall, upgrade, and work with the pyATS framework and libraryDefine test cases, control the flow of test execution, and review test results with built-in reporting featuresGenerate automated network documentation with Jinja2 templates and Genie Conf objectsApply CI/CD practices in network automation with GitLab, Ansible, and pyATSLeverage artificial intelligence in pyATS for enhanced network automation

Embark on a ground-up journey to cloud computing and the Amazon Web Services (AWS) eco-system, including all the other systems, services, and the security associated with it. This book provides you with the practical know-how to become an AWS Cloud practitioner.Your exploration will take you from key fundamentals of identity and access, storage, networking, architectures, databases, security and compute services all the way through to more advanced topics. The book is organized into easy-to-follow and engaging chapters with simple examples to make complex concepts very easy to understand followed by simple step-by-step demonstrations and case studies to make you proficient in every area of AWS. You'll manage databases in your on-prem data centers and set up, operate, and scale relational database in the cloud. All the services and resources taught in this book come from the AWS Free Tier, so you will not have to pay anything to use andlearn from this book. What You'll LearnUnderstand key concepts and benefits of cloud computingEmploy key cloud computing models and services Review the concept of virtual machines in a cloud computing contextStudy compute services that meet your requirementsWho This Book Is ForIT professionals looking to change their domain to cloud computing as well as those who are looking to utilize AWS for their systems and projects.

A little birdy told us you needed to know more about MastodonReady to escape the drama of existing social media platforms and try something new and awesome in the world of social media? In Mastodon For Dummies, experienced tech trainers Chris Minnick and Mike McCallister show you exactly how to use Mastodon, the hot decentralized social media offering on the web and destination for thousands of social media migrants. Learn how to sign up for the service on your choice of server and get familiar with the rules of what's sure to become your new favorite app. You'll discover how to connect with other people, attract your own followers, and make yourself right at home in the Mastodon community.In the book, you'll find:* Easy-to-follow instructions on how to choose the Mastodon server that suits you best* Instructions for establishing new connections on a new social platform and learning the rules of the road* Tips for conducting business on Mastodon and making a home for your home-based business or brand on the social media service* Step-by-step guides on launching your very own serverIf you're ready to leave old social platforms in the rear-view and try something new, grab a copy of Mastodon For Dummies.

Updated to cover Docker version 1.10Docker is quickly changing the way that organizations are deploying software at scale. But understanding how Linux containers fit into your workflowand getting the integration details rightare not trivial tasks. With this practical guide, youll learn how to use Docker to package your applications with all of their dependencies, and then test, ship, scale, and support your containers in production.Two Lead Site Reliability Engineers at New Relic share much of what they have learned from using Docker in production since shortly after its initial release. Their goal is to help you reap the benefits of this technology while avoiding the many setbacks they experienced.Learn how Docker simplifies dependency management and deployment workflow for your applicationsStart working with Docker images, containers, and command line toolsUse practical techniques to deploy and test Docker-based Linux containers in productionDebug containers by understanding their composition and internal processesDeploy production containers at scale inside your data center or cloud environmentExplore advanced Docker topics, including deployment tools, networking, orchestration, security, and configuration

"What is eBPF? With this revolutionary technology, you can write custom code that dynamically changes the way the kernel behaves. It's an extraordinary platform for building a whole new generation of security, observability, and networking tools. This practical book is ideal for developers, system administrators, operators, and students who are curious about eBPF and want to know how it works. Author Liz Rice, chief open source officer with cloud native networking and security specialists Isovalent, also provides a foundation for those who want to explore writing eBPF programs themselves"--

The exponential growth of data combined with the need to derive real-time business value is a critical issue today. An event-driven data mesh can power real-time operational and analytical workloads, all from a single set of data product streams. With practical real-world examples, this book shows you how to successfully design and build an event-driven data mesh. Building an Event-Driven Data Mesh provides: Practical tips for iteratively building your own event-driven data mesh, including hurdles you'll experience, possible solutions, and how to obtain real value as soon as possible Solutions to pitfalls you may encounter when moving your organization from monoliths to event-driven architectures A clear understanding of how events relate to systems and other events in the same stream and across streams A realistic look at event modeling options, such as fact, delta, and command type events, including how these choices will impact your data products Best practices for handling events at scale, privacy, and regulatory compliance Advice on asynchronous communication and handling eventual consistency