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Foundations of Networking and Models

What Is a Computer Network?

Network Types: Understanding Scale and Scope

The OSI Reference Model

TCP/IP Model: The Internet Standard

Encapsulation: Data's Journey Through the Layers

Addressing and Core Technologies

Network Addressing: The Fundamentals

IPv4 Addressing in Depth

A Closer Look: LAN Technologies

WAN Connectivity: Bridging the Distance

Cisco Platforms, Devices, and Operations

Network Devices: Building Blocks of Connectivity

The Cisco IOS Operating System

Network Troubleshooting Methodology

Security, Reliability, and Automation

Network Security Fundamentals

Designing for Reliability: Network Redundancy

Network Automation and Programmability

Assessment and Readiness

Foundations Quiz

Models and Encapsulation Quiz

Addressing and LAN/WAN Quiz

Cisco Operations and Troubleshooting Quiz

Security, Reliability, and Automation Quiz

Preparing for Your CCNA Exam

Your Network Engineering Journey: Beyond CCNA

Kick-start your networking career with CCNA Networking Fundamentals: Foundational Security and Threat Mitigation. Designed around the most current CCNA exam domains, this course builds a rock-solid foundation in network models, addressing, core LAN/WAN technologies, Cisco platforms, and day-to-day operations—then levels you up with essential security, reliability, and automation concepts. You’ll move from understanding how data flows through the OSI and TCP/IP models to configuring and troubleshooting Cisco IOS devices with confidence. Along the way, you’ll master IPv4 addressing, explore LAN switching and WAN connectivity, and adopt proven troubleshooting methodologies used by professionals. Security is woven throughout the program, equipping you to recognize common threats, harden your network with practical controls, and design with resilience in mind using redundancy and high availability. Finally, you’ll get hands-on guidance for network automation and programmability to prepare you for modern, software-driven infrastructures. Each section includes focused quizzes to validate your progress and build exam readiness. Whether you’re preparing for your first networking role, upskilling in IT, or aiming to pass the CCNA exam, this course gives you the clarity, practice, and confidence to operate and secure real-world networks and mitigate threats effectively.

CCNA Networking Fundamentals: Foundational Security and Threat Mitigation

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            <p>Networks power modern business, connect people and devices, and enable secure, scalable digital services. CCNA Networking Fundamentals: Foundational Security and Threat Mitigation builds the bedrock you need to understand how those networks are designed, addressed, secured, and operated—through the lens of Cisco technologies and industry standards. We begin by demystifying what a computer network is and why structured models matter. You will compare the OSI and TCP/IP models, trace how data is encapsulated as it moves across layers, and distinguish different network types by their scale and scope. This foundation ensures you can explain not just how packets move, but why architectures are built the way they are.</p>
<p>With the models in place, the course progresses into the addressing and technologies that make real networks work. You will master IPv4 addressing concepts, explore LAN technologies in depth, and understand how WAN connectivity bridges distance to deliver resilient services. From there, we focus on Cisco platforms and day-to-day operations: the roles of common network devices, the Cisco IOS operating system, and a proven troubleshooting methodology. Finally, we emphasize security, reliability, and automation—core competencies for modern network engineers. You will learn essential security fundamentals and threat mitigation principles, design for redundancy and high availability, and see how automation and programmability increase consistency and reduce risk. Continuous assessment through targeted quizzes reinforces each section, and we close with practical guidance on CCNA exam readiness and next steps in your network engineering journey.</p>
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