🌐12 Key Networking Concepts Every IT Professional Must Know Whether you’re starting your journey in networking or aiming for CCNA, CCNP, or Cybersecurity roles, mastering these 12 core concepts is the foundation of your IT career. 🔹 IP Address – Identity of every device in a network 🔹 Port – Entry & exit points for network traffic 🔹 Node – Any connected device like PC, printer, or router 🔹 Router – Connects multiple networks together 🔹 DMZ – A secure buffer zone between internal and public