📄️ OSI Model
The 7-layer OSI Model conceptual framework for network communication, including layer breakdown, PDUs, and comparison with TCP/IP
📄️ TCP/IP Model
The practical 4-layer TCP/IP Model that powers the internet, including protocol breakdown, kernel vs user space, and real-world implementation
📄️ DNS (Domain Name System)
The hierarchical distributed database that translates domain names to IP addresses, including DNS resolution flow, record types, and caching strategies