🔐 Top Network Security Cheat sheet – Understand Threats at Every OSI Layer! 🌐 As an IT instructor and enthusiast in network security, I always emphasize the importance of understanding how vulnerabilities can exist at every layer of the OSI model. This clear and colorful cheat sheet by eLearn Programming breaks it down perfectly—from physical tampering to SQL injections. 📌 Here's a quick layer-wise highlight: Application Layer (7): SQL Injection, XSS, DDoS Presentation Layer (6): SSL Strippin