Mastering Active Directory. Design, deploy, and protect Active Directory Domain Services for Windows Server 2022 - Third Edition

Dishan Francis

Mastering Active Directory, Third Edition is a comprehensive guide for Information Technology professionals looking to improve their knowledge about MS Windows Active Directory Domain Service. The audiobook will help you to use identity elements effectively and manage your organization’s infrastructure in a secure and efficient way. This third edition has been fully updated to reflect the importance of cloud-based strong authentication and other tactics to protect identity infrastructure from emerging security threats.Mastering Active Directory, Third Edition provides extensive coverage of AD Domain Services and helps you explore their capabilities as you update to Windows Server 2022. This audiobook will also teach you how to extend on-premises identity presence to cloud via Azure AD hybrid setup. By the end of this Microsoft Active Directory, you’ll feel confident in your ability to design, plan, deploy, protect, and troubleshoot your enterprise identity infrastructure.

GitHub for Next-Generation Coders. Build your ideas, share your code, and join a community of creators

Igor Irić

Navigating the world of collaborative software development can be daunting, especially for young coders just starting their programming journey. This book is designed to take you on a coding adventure, transforming you from a curious beginner into a confident GitHub user.The book builds a solid foundation and explains the Git version control system in depth, helping you understand how to track changes, collaborate effectively, and manage your projects with ease. You'll master repositories, the building blocks of your coding projects, and learn branching strategies to experiment and work seamlessly with others. The chapters will teach you about GitHub Actions, guiding you through workflow syntax, exploring environments and secrets management, and providing hands-on exercises to solidify your understanding. You’ll also discover how to craft a compelling GitHub profile that highlights your achievements and discover the exciting world of open-source projects where you can contribute and give back to the community. To get you started with AI, you’ll also learn how to leverage Copilot and ChatGPT together to write faster, cleaner code.By the end of this book, you’ll be well prepared to contribute to real-world projects on GitHub, equipped with the skills to thrive in the world of collaborative software development.

The Software Developer's Guide to Linux. A practical, no-nonsense guide to using the Linux command line and utilities as a software developer

David Cohen, Christian Sturm

Developers are always looking to raise their game to the next level, yet most are completely lost when it comes to the Linux command line.This book is the bridge that will take you to the next level in your software development career. Most of the skills in the book can be immediately put to work to make you a more efficient developer. It’s written specifically for software engineers, not Linux system administrators, so each chapter will equip you with just enough theory to understand what you’re doing before diving into practical commands that you can use in your day-to-day work as a software developer.As you work through the book, you’ll quickly absorb the basics of how Linux works while you get comfortable moving around the command line. Once you’ve got the core skills, you’ll see how to apply them in different contexts that you’ll come across as a software developer: building and working with Docker images, automating boring build tasks with shell scripts, and troubleshooting issues in production environments.By the end of the book, you’ll be able to use Linux and the command line comfortably and apply your newfound skills in your day-to-day work to save time, troubleshoot issues, and be the command-line wizard that your team turns to.

Getting Started with Beautiful Soup. Learn how to extract information from websites using Beautiful Soup and the Python urllib2 module. This practical, hands-on guide covers everything you need to know to get a head start in website scraping

Vineeth G. Nair, Vineeth G Nair

Beautiful Soup is a Python library designed for quick turnaround projects like screen-scraping. Beautiful Soup provides a few simple methods and Pythonic idioms for navigating, searching, and modifying a parse tree: a toolkit for dissecting a document and extracting what you need without writing excess code for an application. It doesn't take much code to write an application using Beautiful Soup.Getting Started with Beautiful Soup is a practical guide to Beautiful Soup using Python. The book starts by walking you through the installation of each and every feature of Beautiful Soup using simple examples which include sample Python codes as well as diagrams and screenshots wherever required for better understanding. The book discusses the problems of how exactly you can get data out of a website and provides an easy solution with the help of a real website and sample code.Getting Started with Beautiful Soup goes over the different methods to install Beautiful Soup in both Linux and Windows systems. You will then learn about searching, navigating, content modification, encoding support, and output formatting with the help of examples and sample Python codes for each example so that you can try them out to get a better understanding. This book is a practical guide for scraping information from any website. If you want to learn how to efficiently scrape pages from websites, then this book is for you.

Getting Started with Paint.NET. Learning the free Paint.NET photo editing program means you can achieve any professional effect you want, and this book shows you how, ranging from installation and plugins to advanced imaging techniques

Shoban Kumar, Andros T Sturgeon

Paint.NET is a free, reliable program that rivals the most expensive photo editing programs currently on the market.Paint.NET supports plugins, which add image adjustments, effects, and support for additional file types. They can be programmed using any .NET programming language, though they are most commonly written in C#.This book will teach you everything you need to know to edit and manipulate images. Written with very clear walkthroughs, hands-on tutorials,and amazing resources, this book will turn you into a photo wizard with Paint.NET. The book starts with simple tool-based tasks, introduces you to the workpane and then builds up to more complex areas taking a deep dive into the commonly-used features of Paint.NET.With this book, you will learn how to do everything from making simple adjustments to full artistic rendering with tools not available in any other program. Starting with the very basics of photo editing, you will gain an understanding of the basic principles of manipulating images. From layering to special effects, this book will give you all the knowledge you need to create images that leave a lasting impression.This book has everything you need to make amazing, artistic photos using completely free software. Filled with fun exercises and valuable information, you will learn how to master every tool and every effect in Paint.NET. Within minutes, you will be able to resize images, make adjustments to brightness and contrast, and apply color correction. By the end of this book, you will be working with layers and effects to create images that rival some of the most advised and expensive pieces of software.With simple exercises and information, this book will take you from absolute novice to an accomplished photo editor quickly and easily.

Designing Information Architecture. A practical guide to structuring digital content for findability and easy navigability

Pabini Gabriel-Petit, Jim Kalbach

In a world that suffers from information overload, how can information architects help people quickly find the exact digital content they need? This is where Designing Information Architecture comes in as your practical guide to creating easy-to-use experiences for digital information spaces—be it websites, applications, or intranets—by creating well-structured information architectures (IAs) and effective navigation and search systems. It shows you how to improve the organization, findability, and usability of digital content using proven IA design methods and strategies.Designing Information Architecture is an up-to-date resource on IA. Written by Pabini Gabriel-Petit, a recognized expert in user experience (UX) and IA with decades of industry experience, this book offers both expert insights and practical design guidance. It also explores modern, AI-driven approaches to implementing search systems that can help users overcome the challenges of information overload.Throughout the book, you’ll learn why a well-structured information architecture remains more critical than ever in delivering effective digital information spaces.

An iOS Developer's Guide to SwiftUI. Design and build beautiful apps quickly and easily with minimum code

Michele Fadda

– SwiftUI transforms Apple Platform app development with intuitive Swift code for seamless UI design. – Explore SwiftUI's declarative programming: define what the app should look like and do, while the OS handles the heavy lifting. – Hands-on approach covers SwiftUI fundamentals and often-omitted parts in introductory guides. – Progress from creating views and modifiers to intricate, responsive UIs and advanced techniques for complex apps. – Focus on new features in asynchronous programming and architecture patterns for efficient, modern app design. – Learn UIKit and SwiftUI integration, plus how to run tests for SwiftUI applications. – Gain confidence to harness SwiftUI's full potential for building professional-grade apps across Apple devices.

Mastering iOS 18 Development. Take your iOS development experience to the next level with iOS, Xcode, Swift, and SwiftUI

Avi Tsadok

Embark on a comprehensive iOS 18 development journey with Avi Tsadok, a veteran iOS developer and author of 4 books and over 40 tutorials and articles. A recognized public speaker, Avi has a knack for demystifying complex concepts and brings unparalleled expertise to the forefront of iOS 18 development education. This guide focuses on iOS 18 advancements, equipping developers with tools to maximize its potential.This book covers essential topics for seasoned developers, including Swift, SwiftUI, Xcode foundations, and the latest iOS SDK updates. You’ll get to grips with optimizing performance and understanding advanced architectural paradigms. By implementing the newest iOS updates, you’ll also explore intricate animation methods and harness a new framework, SwiftData that replaces Core Data for having persistent storage. The book builds your proficiency in advanced networking with URLSession and shows you how to conjure stunning visuals and adopt sophisticated testing techniques. You'll explore the world of machine learning with Apple’s Core ML diving into built-in frameworks like NLP, vision, and sound analysis to train and integrate your own models into iOS apps.By the end of the book, you'll possess skills to build exceptional apps, excel in advanced roles, and confidently tackle iOS development challenges.

Data Science for Malware Analysis. A comprehensive guide to using AI in detection, analysis, and compliance

Shane Molinari, Jim Packer

In today's world full of online threats, the complexity of harmful software presents a significant challenge for detection and analysis. This insightful guide will teach you how to apply the principles of data science to online security, acting as both an educational resource and a practical manual for everyday use.Data Science for Malware Analysis starts by explaining the nuances of malware, from its lifecycle to its technological aspects before introducing you to the capabilities of data science in malware detection by leveraging machine learning, statistical analytics, and social network analysis. As you progress through the chapters, you’ll explore the analytical methods of reverse engineering, machine language, dynamic scrutiny, and behavioral assessments of malicious software. You’ll also develop an understanding of the evolving cybersecurity compliance landscape with regulations such as GDPR and CCPA, and gain insights into the global efforts in curbing cyber threats.By the end of this book, you’ll have a firm grasp on the modern malware lifecycle and how you can employ data science within cybersecurity to ward off new and evolving threats.

Google Cloud Digital Leader Certification Guide. A comprehensive study guide to Google Cloud concepts and technologies

Bruno Beraldo Rodrigues

To thrive in today's world, leaders and technologists must understand how technology shapes businesses. As organizations shift from self-hosted to cloud-native solutions, embracing serverless systems, strategizing data use, and defining monetization becomes imperative. The Google Cloud Digital Leader Certification Guide lays a solid foundation of industry knowledge, focused on the Google Cloud platform and the innovative ways in which customers leverage its technologies.The book starts by helping you grasp the essence of digital transformation within the Google Cloud context. You’ll then cover core components of the platform, such as infrastructure and application modernization, data innovation, and best practices for environment management and security. With a series of practice exam questions included, this book ensures that you build comprehensive knowledge and prepare to certify as a Google Cloud Digital Leader. Going beyond the exam essentials, you’ll also explore how companies are modernizing infrastructure, data ecosystems, and teams in order to capitalize on new market opportunities through platform expertise, best practices, and real-world scenarios.By the end of this book, you'll have learned everything you need to pass the Google Cloud Digital Leader certification exam and have a reference guide for future requirements.

Real-World Svelte. Supercharge your apps with Svelte 4 by mastering advanced web development concepts

Tan Li Hau, Rich Harris

Svelte has quickly become a popular choice among developers seeking to build fast, responsive, and efficient web applications that are high-performing, scalable, and visually stunning. This book goes beyond the basics to help you thoroughly explore the core concepts that make Svelte stand out among other frameworks.You’ll begin by gaining a clear understanding of lifecycle functions, reusable hooks, and various styling options such as Tailwind CSS and CSS variables. Next, you’ll find out how to effectively manage the state, props, and bindings and explore component patterns for better organization. You’ll also discover how to create patterns using actions, demonstrate custom events, integrate vanilla JS UI libraries, and progressively enhance UI elements. As you advance, you’ll delve into state management with context and stores, implement custom stores, handle complex data, and manage states effectively, along with creating renderless components for specialized functionalities and learning animations with tweened and spring stores. The concluding chapters will help you focus on enhancing UI elements with transitions while covering accessibility considerations.By the end of this book, you’ll be equipped to unlock Svelte's full potential, build exceptional web applications, and deliver performant, responsive, and inclusive user experiences.

Midjourney. Leverage The Future Of Creativity

Adrian Twarog

Unleash the full potential of Midjourney by mastering the essentials of prompt creation. The book begins with an in-depth exploration of prompt anatomy, teaching you the key components that make up an effective input. From there, you'll move on to crafting your first Midjourney prompt, gaining confidence as you bring your creative ideas to life.As you progress, you'll delve into the vital commands and the parameter list that enable you to fine-tune your results. Each concept is broken down into actionable insights, ensuring you fully understand how to control Midjourney’s output. By learning the interplay of these elements, you’ll start crafting outputs tailored to your vision.Finally, advanced techniques take center stage, showing you how to push the boundaries of your creativity. Whether you're creating stunning visuals, refining complex ideas, or exploring new ways to express yourself, this course equips you with the tools and knowledge to excel in the world of Midjourney.

Architecting Solutions with SAP Business Technology Platform. An architectural guide to integrating, extending, and innovating enterprise solutions using SAP BTP

Serdar Simsekler, Eric Du

SAP BTP is the foundation of SAP’s intelligent and sustainable enterprise vision for its customers. It’s efficient, agile, and an enabler of innovation. It’s technically robust, yet its superpower is its business centricity.If you’re involved in building IT and business strategies, it’s essential to familiarize yourself with SAP BTP to see the big picture for digitalization with SAP solutions. Similarly, if you have design responsibilities for enterprise solutions, learning SAP BTP is crucial to produce effective and complete architecture designs.This audiobook teaches you about SAP BTP in five parts. First, you’ll see how SAP BTP is positioned in the intelligent enterprise. In the second part, you’ll learn the foundational elements of SAP BTP and find out how it operates. The next part covers integration architecture guidelines, integration strategy considerations, and integration styles with SAP’s integration technologies. Later, you’ll learn how to use application development capabilities to extend enterprise solutions for innovation and agility. This part also includes digital experience and process automation capabilities. The last part covers how SAP BTP can facilitate data-to-value use cases to produce actionable business insights.By the end of this SAP audiobook, you’ll be able to architect solutions using SAP BTP to deliver high business value.

Getting Started with Docker. Master the Art of Containerization with Docker

Nigel Poulton

Embark on an exciting journey into the realm of Docker, where you'll discover the transformative potential of containerization. The course begins with an introduction to containers, providing a solid foundation for understanding their importance in modern software development. You'll then learn how to install Docker, setting up your environment for success.As you progress, you'll run your first container, gaining hands-on experience with Docker's core functionalities. The course delves into containerizing applications, offering practical insights into creating and managing Docker images. You'll explore Docker registries, learning how to store and share your images efficiently.The adventure continues with multi-container applications using Docker Compose. You'll master the skills needed to orchestrate complex applications, ensuring smooth integration and deployment. The course also introduces Docker's integration with WebAssembly, showcasing cutting-edge techniques to further enhance your development process. By the end, you'll be equipped with the knowledge and confidence to take your containerization skills to the next level.

Transformers for Natural Language Processing and Computer Vision. Explore Generative AI and Large Language Models with Hugging Face, ChatGPT, GPT-4V, and DALL-E 3 - Third Edition

Denis Rothman

Transformers for Natural Language Processing and Computer Vision, Third Edition, explores Large Language Model (LLM) architectures, applications, and various platforms (Hugging Face, OpenAI, and Google Vertex AI) used for Natural Language Processing (NLP) and Computer Vision (CV).The book guides you through different transformer architectures to the latest Foundation Models and Generative AI. You’ll pretrain and fine-tune LLMs and work through different use cases, from summarization to implementing question-answering systems with embedding-based search techniques. You will also learn the risks of LLMs, from hallucinations and memorization to privacy, and how to mitigate such risks using moderation models with rule and knowledge bases. You’ll implement Retrieval Augmented Generation (RAG) with LLMs to improve the accuracy of your models and gain greater control over LLM outputs.Dive into generative vision transformers and multimodal model architectures and build applications, such as image and video-to-text classifiers. Go further by combining different models and platforms and learning about AI agent replication.This book provides you with an understanding of transformer architectures, pretraining, fine-tuning, LLM use cases, and best practices.

Essential Guide to LLMOps. Implementing effective strategies for Large Language Models in deployment and continuous improvement

Ryan Doan

The rapid advancements in large language models (LLMs) bring significant challenges in deployment, maintenance, and scalability. This Essential Guide to LLMOps provides practical solutions and strategies to overcome these challenges, ensuring seamless integration and the optimization of LLMs in real-world applications.This book takes you through the historical background, core concepts, and essential tools for data analysis, model development, deployment, maintenance, and governance. You’ll learn how to streamline workflows, enhance efficiency in LLMOps processes, employ LLMOps tools for precise model fine-tuning, and address the critical aspects of model review and governance. You’ll also get to grips with the practices and performance considerations that are necessary for the responsible development and deployment of LLMs. The book equips you with insights into model inference, scalability, and continuous improvement, and shows you how to implement these in real-world applications.By the end of this book, you’ll have learned the nuances of LLMOps, including effective deployment strategies, scalability solutions, and continuous improvement techniques, equipping you to stay ahead in the dynamic world of AI.

Design for Developers. A guide to basic design rules and formulas to create good looking components, colors and typography

Adrian Twarog, George Moller

For developers eager to enhance their UI design skills, this book offers a comprehensive guide to design fundamentals. Starting with the essentials like color theory and typography, it progresses through component design and visual hierarchy, culminating in a hands-on approach to building design systems and implementing them in projects. Readers will gain the tools and confidence to integrate aesthetics into their coding projects.The book balances theoretical concepts like visual hierarchy, color psychology, and text legibility with actionable techniques for wireframing, building UI components, and creating full-fledged design systems. Each chapter delves deep into practical strategies, such as selecting color palettes, designing scalable typography, and constructing reusable elements like buttons and icons.By the end of this journey, readers will have a thorough understanding of how to blend design principles with development expertise to craft seamless and engaging user experiences. They will be equipped to create beautiful, functional, and consistent interfaces that are as intuitive as they are visually striking.

Mastering AutoCAD. Level up your AutoCAD skills with advanced methods and tools, including AutoCAD Web and Trace

Shaun Bryant, Jessica Langston, Jeanne Aarhus

AutoCAD helps you communicate your design intent by plotting your designs to drawings, in both paper and electronic format. But using AutoCAD can be daunting, even for an experienced user who wants to get their designs into the AutoCAD native DWG file format.Written by an Autodesk Certified Instructor at Platinum level with 30+ years of industry experience, this book will guide you on how to use new and existing AutoCAD tools to work smarter, not harder, and it will familiarize you with the processes needed to use AutoCAD much more effectively. As you work through the chapters, you’ll get used to these new methodologies in AutoCAD and build up muscle memory so that these skills become second nature. You’ll also take advantage of the author's expertise and experience, learning some highly effective AutoCAD tips and tricks along the way.By the end of this AutoCAD book, you’ll have gained valuable insights into the knowledge needed to confidently prepare for your Autodesk AutoCAD certification.

Optimizing Salesforce Industries Solutions on the Vlocity OmniStudio Platform. Implementing OmniStudio best practices for achieving maximum performance

Dmitri Khanine

Salesforce Industries brings out-of-the-box solutions tailored to specific industries, making it easy for customers to install, configure, and slash their time-to-value. It stands as one of Salesforce's strategic pillars with the number of installations growing rapidly.While customizing the out-of-the-box solutions can pose performance challenges, this book provides a fail-safe system with proven best practices, tools, and precise metrics to enhance performance and scalability for efficient outcomes.Kicking off with an overview of the Salesforce Industries Vlocity platform and OmniStudio, you’ll explore the tools and techniques used to manage code and measure performance. Delving into performance optimization, you’ll uncover methods for improving performance in OmniStudio's Service Layer (Integration Procedures and DataRaptors) and Presentation Layer (OmniScripts and FlexCards). Further, the book will guide you through achieving maximum performance by leveraging best practices in both layers.By the end of this book, you’ll have mastered the intricacies of Salesforce Industries on the Vlocity OmniStudio Platform, enhancing your skills to navigate and optimize tailored solutions effectively.

C# and Algorithmic Thinking for the Complete Beginner. Unlock the Power of Programming with C# and Algorithmic Thinking

Aristides Bouras

This course takes you on a journey through the basics of C# programming and algorithmic thinking, tailored specifically for complete beginners. Starting with an understanding of how a computer works, you will explore integrated development environments, essential software packages, and basic algorithmic concepts.As you progress, you will delve deeper into key programming constructs such as variables, constants, input and output handling, operators, and control structures. The course emphasizes practical application, guiding you through exercises involving complex mathematical expressions, string manipulations, decision structures, and loop control structures. By the time you reach the advanced sections, you will have a comprehensive understanding of data structures, subprograms, and object-oriented programming.Designed to be engaging and informative, this course offers tips, tricks, and detailed explanations to help you master each concept. The use of Visual Studio Code is seamlessly integrated, providing you with hands-on experience in a real-world development environment. By the end of the course, you will be well-equipped to tackle more advanced programming challenges and continue your journey in the world of software development.

Data Science with .NET and Polyglot Notebooks. Programmer's guide to data science using ML.NET, OpenAI, and Semantic Kernel

Matt Eland

As the fields of data science, machine learning, and artificial intelligence rapidly evolve, .NET developers are eager to leverage their expertise to dive into these exciting domains but are often unsure of how to do so. Data Science in .NET with Polyglot Notebooks is the practical guide you need to seamlessly bring your .NET skills into the world of analytics and AI. With Microsoft’s .NET platform now robustly supporting machine learning and AI tasks, the introduction of tools such as .NET Interactive kernels and Polyglot Notebooks has opened up a world of possibilities for .NET developers. This book empowers you to harness the full potential of these cutting-edge technologies, guiding you through hands-on experiments that illustrate key concepts and principles. Through a series of interactive notebooks, you’ll not only master technical processes but also discover how to integrate these new skills into your current role or pivot to exciting opportunities in the data science field. By the end of the book, you’ll have acquired the necessary knowledge and confidence to apply cutting-edge data science techniques and deliver impactful solutions within the .NET ecosystem.

Web App Development Made Simple with Streamlit. A web developer's guide to effortless web app development, deployment, and scalability

Rosario Moscato

This book is a comprehensive guide to the Streamlit open-source Python library and simplifying the process of creating web applications. Through hands-on guidance and realistic examples, you’ll progress from crafting simple to sophisticated web applications from scratch. This book covers everything from understanding Streamlit's central principles, modules, basic features, and widgets to advanced skills such as dealing with databases, hashes, sessions, and multipages.Starting with fundamental concepts like operation systems virtualization, IDEs, development environments, widgets, scripting, and the anatomy of web apps, the initial chapters set the groundwork. You’ll then apply this knowledge to develop some real web apps, gradually advancing to more complex apps, incorporating features like natural language processing (NLP), computer vision, dashboards with interactive charts, file uploading, and much more. The book concludes by delving into the implementation of advanced skills and deployment techniques.By the end of this book, you’ll have transformed into a proficient developer, equipped with advanced skills for handling databases, implementing secure login processes, managing session states, creating multipage applications, and seamlessly deploying them on the cloud.

The AI Product Manager's Handbook. Develop a product that takes advantage of machine learning to solve AI problems

Irene Bratsis

Product managers working with artificial intelligence will be able to put their knowledge to work with this practical guide to applied AI. This audiobook covers everything you need to know to drive product development and growth in the AI industry. From understanding AI and machine learning to developing and launching AI products, it provides the strategies, techniques, and tools you need to succeed.The first part of the audiobook focuses on establishing a foundation of the concepts most relevant to maintaining AI pipelines. The next part focuses on building an AI-native product, and the final part guides you in integrating AI into existing products.You’ll learn about the types of AI, how to integrate AI into a product or business, and the infrastructure to support the exhaustive and ambitious endeavor of creating AI products or integrating AI into existing products. You’ll gain practical knowledge of managing AI product development processes, evaluating and optimizing AI models, and navigating complex ethical and legal considerations associated with AI products. With the help of real-world examples and case studies, you’ll stay ahead of the curve in the rapidly evolving field of AI and ML.By the end of this audiobook, you’ll have understood how to navigate the world of AI from a product perspective.

Cyber Warfare - Truth, Tactics, and Strategies. Strategic concepts and truths to help you and your organization survive on the battleground of cyber warfare

Dr. Chase Cunningham

The era of cyber warfare is now upon us. What we do now and how we determine what we will do in the future is the difference between whether our businesses live or die and whether our digital self survives the digital battlefield. Cyber Warfare – Truth, Tactics, and Strategies takes you on a journey through the myriad of cyber attacks and threats that are present in a world powered by AI, big data, autonomous vehicles, drones video, and social media.Dr. Chase Cunningham uses his military background to provide you with a unique perspective on cyber security and warfare. Moving away from a reactive stance to one that is forward-looking, he aims to prepare people and organizations to better defend themselves in a world where there are no borders or perimeters. He demonstrates how the cyber landscape is growing infinitely more complex and is continuously evolving at the speed of light.The audiobook not only covers cyber warfare, but it also looks at the political, cultural, and geographical influences that pertain to these attack methods and helps you understand the motivation and impacts that are likely in each scenario.Cyber Warfare – Truth, Tactics, and Strategies is as real-life and up-to-date as cyber can possibly be, with examples of actual attacks and defense techniques, tools. and strategies presented for you to learn how to think about defending your own systems and data.