📍 The Internet’s Postal System. Welcome to IP Address Classification & Subnetting Fundamentals. Every device on a network needs a unique identifier—an IP Address. This video breaks down the foundational architecture of the Internet: how IP addresses are structured, classified, and divided into networks through subnetting. Whether you’re configuring a home router, designing enterprise networks, or conducting security assessments, this knowledge is non-negotiable. We’ll demystify binary math, network masks, and address classes to give you a clear, practical understanding of how networks are built and how you can map them. 💡 Core Concepts You’ll Master: ✅ Reading and converting IP addresses between dotted decimal and binary. ✅ Differentiating between Classful (historical) and Classless (CIDR) addressing. ✅ Calculating valid host ranges, network addresses, and broadcast addresses from any given IP and subnet mask. ✅ Identifying public, private, and special-use IP addresses. ✅ Understanding how subnetting creates logical network segments for security and management. 🚨 PRACTICAL & ETHICAL NOTE: While IP addressing knowledge is fundamental, its application has boundaries: Network Enumeration: Using this knowledge to map unauthorized networks may be illegal. IP Ownership: Public IPs can often be geolocated; respect privacy and legal frameworks. Proper Design: Misconfiguring IP schemes can cause network outages. Always test in lab environments first. This knowledge is a tool for building and securing networks, not for unauthorized exploration. 🔗 Learning Resources & Practice Tools: Subnetting Practice: SubnettingPractice.com, Cisco’s Subnetting Games Network Simulation: Cisco Packet Tracer, GNS3 (for visual learning) Command Line: ipcalc (Linux), online subnet calculators Learning Platforms: TryHackMe (Introductory Networking room), Professor Messer’s Network+ Videos Subscribe (🔔) to build the networking expertise that powers all cybersecurity domains. Next, we’ll demystify Routing Protocols—how packets find their way across networks. #Networking #IPAddress #Subnetting #CyberSecurity #ITSkills #CCNA #NetworkEngineer #CIDR #IPv4 #TechEducation #ITTraining #CyberSecurityTraining #NetworkSecurity #TechFundamentals