🧠 Computer Science
Categories of the section
**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.
Computer Networks — course structure**Databases** store and organize application data—from blogs to banking systems. This course introduces the relational model and SQL using PostgreSQL. You will design tables, write SELECT/INSERT/UPDATE/DELETE queries, use JOINs and indexes, and understand transactions and normalization at a practical level. After the course you can work with databases in pet projects, read production schemas, and go deeper into optimization or NoSQL.
Databases — course structure**Blockchain** is a distributed ledger behind cryptocurrencies and some decentralized apps. This course explains the technology without hype or “get rich quick” promises. You will learn how blocks, hashes, consensus, smart contracts, and wallets work at a conceptual level. The material shows where blockchain fits and where a classic database is simpler. After the course you can discuss Web3 projects thoughtfully, read whitepapers, and decide whether to dive into Ethereum or other platforms.
Blockchain — course structure