🌐 Computer Networks

**Computer networks** explain how devices exchange data on the internet and in local networks. This course gives fundamentals without deep hardware admin—focused on how things work. You will study OSI and TCP/IP models, IP addressing, DNS, HTTP, routing basics, and common connectivity issues. The material connects “network magic” to real browser and API requests. After the course you will understand what happens when you open a website and read DevOps and backend docs with more confidence.