Backend Internet - How does the internet work? - What is HTTP? - Browsers and how they work? https://d2.naver.com/helloworld/59361 - DNS and how it works? - What is Domain Name? - What is hosting? Basic Frontend Knowledge - HTML - CSS - Javascript OS and General Knowledge - Terminal Usage - How OSs work in General - Process Management - Threads and Concurrency - Basic Terminal Commands(grep, awk..