Introduction to Web Servers - Mastering Everything from Request to Response

Learn practical AIOps methodologies to move beyond alarm storms and repetitive incident responses toward data-driven problem prediction and automation. This is a practice-oriented course infused with 20 years of operational experience, covering everything from data preparation and anomaly detection to root cause analysis that can be applied immediately in the field without being tied to a specific product.

Learn step-by-step English expressions actually used in IT practice, from reading official documentation and writing tickets or emails to sharing incident reports and conducting technical interviews. Master practical English that you can apply immediately today with templates and examples extracted from over 20 years of infrastructure operations experience. Learn real-world business English for global collaboration, not just English for exams.

This is a practical introductory course for new employees and juniors. You will systematically learn essential business fundamentals, from understanding instructions to reporting and task management. Through hands-on practice, you will master work processes that can be applied immediately.

Learn practical techniques to start studying through structure rather than willpower. Master twelve execution design methods along with worksheets to lower the barrier to starting, recover broken focus, and prevent a single day's failure from turning into giving up.

This is an introductory networking course for non-majors that focuses on understanding the flow of communication through visuals rather than memorizing terminology. Using the layered model as a framework, we follow the entire process of what happens when you enter a URL into the address bar from start to finish, helping you build practical networking intuition that can be applied immediately in the real world.

For beginners new to messaging systems, this guide explains everything from Kafka's origins to its core components, operating principles, and practical applications using only concepts and illustrations. Without the need for code or installation, it clearly distinguishes key terminology such as topics, partitions, and consumer groups, helping you build the fundamental strength to read real-world architecture diagrams.

Learn the basic structure of Saju Palja and the meanings of the Heavenly Stems and Earthly Branches, and study how to establish and interpret your own Saju using the Manseryeok (Ten Thousand Year Calendar). By understanding the Sipsin system and the flow of Daewun (Great Fortune) and Sewun (Annual Fortune), you will be able to read your own Saju and write an interpretation report in just 12 sessions.

Systematically master the basics of English speaking by following a 4-week curriculum with precise daily instructions. With 50 core expressions, verb usage, and practical scripts all included in the slides, you can master daily training methods and apply them immediately without the need for a separate textbook. Through a comprehensive learning design spanning from diagnosis to correction, even beginners can gain confidence in basic conversation within just 4 weeks.

You will systematically learn the principles of how the CPU, memory, and disk collaborate, as well as how the operating system mediates resources. You will acquire practical foundational knowledge to read server specification sheets and identify performance bottlenecks, establishing a basis for learning about cloud and network technologies.

It is perfectly fine if you have no prior programming experience. We will learn step-by-step, from environment setup to error troubleshooting and basic syntax, while building a working program in every single lecture. After completing the 10-lecture course, you will be able to design and implement simple programs on your own.

We will follow the entire flow of a request, from the moment an address is entered into a web browser until the results are displayed on the screen. By comprehensively understanding how the terms learned in lessons 1 to 3 are actually connected and function, you will develop the diagnostic skills to quickly narrow down the problem area when a failure occurs.

An introductory course that makes the terminal less intimidating even for Linux beginners, teaching you how to view server logs, find files, and develop practical skills using just cd / ls / grep

This is a 4-week program designed to build English speaking circuits through sentence output training rather than word memorization. Through 15 minutes of daily training involving whole-sentence memorization and a 5-step shadowing process, you will develop the ability to speak English with instant reactions without translating in your head. We focus on training mouth muscles and reaction speed rather than just injecting knowledge.

You will learn the criteria for distinguishing seemingly similar IT roles based on the nature of 'what they do' rather than just their titles. You will be able to grasp the reality behind confusing job names such as Backend, Infrastructure, DevOps, SRE, and Platform Engineer, and develop the ability to judge the nature of a position by reading job postings to set a career direction that suits you.

Have you ever skipped over the difference between m7i and m7g in the AWS console without knowing what it was? This lecture clearly explains the concept of AWS Graviton (ARM-based processors) in just 30 minutes. From instance type naming conventions to cost-saving principles and practical application criteria, we explain everything step-by-step at a beginner's level.

Systematically learn over 60 IT terms encountered in practice, ranging from job postings to meeting minutes and incident reports. Understand service structures by dividing them into four layers, and acquire the essential vocabulary needed for collaborating with development teams and attending technical lectures.

Understand core AI concepts through visual materials—no formulas or code required—and practice prompt writing and task-specific application patterns. Covering everything from machine learning to generative AI, this practical introductory course empowers non-majors to apply AI directly to their work in just 90 minutes.

This is a process for building the habit of overcoming the 'fear of starting' and completing practical writing tasks such as reports, proposals, and blog posts. You will learn step-by-step practical methodologies from setting the target audience to drafting and revising, enabling you to refine and complete writing that fits your specific purpose.

Master all the wine-buying essentials in just 2 hours, covering everything from grape varieties, label reading, and tasting techniques to selecting wines for any occasion and food pairing. Through practical, jargon-free lessons, you will gain the confidence to pick out a bottle at the store.

This course focuses on solving the problem of getting stuck in interviews and practical work due to a lack of understanding of why certain structures and configurations are necessary, rather than just teaching how to configure NGINX. Based on experience evaluating numerous candidates as an interviewer for companies like Naver, Kakao, and Toss, I explain how to describe and utilize NGINX from the perspectives of performance, scalability, and operations through hands-on practice. The core of this course is to help you develop a mindset capable of tracing traffic flow and troubleshooting problems, rather than just memorizing configuration values.

Through this course, you will be able to create a non-fungible NFT (Non Fungible Token) based application.

With a practical example, we will design and develop a web application using Spring Boot and JPA. Through this process, you will understand how to use Spring Boot and JPA in practice.

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I have created an introductory CI/CD course that is easy to understand even for non-majors and can be applied immediately in practice!

Through this lecture, you can create a shopping mall website from scratch step by step.

Understand the core concepts of Kubernetes and the principles of microservice architecture through hands-on training.

This lecture provides a rough overview of backend basics with FastAPI, along with deploying to AWS using React.js, allowing you to quickly experience the actual deployment process.

Do you want to become a web frontend developer? Take your first step with a fun JavaScript course✨

Through this course, you will learn not only concepts such as React and Node, but also how to practically create a website.

Learn the fundamentals of the web, networks, and HTTP that every developer should know, in a code-based, real-world, data-driven way.

Have you learned JavaScript but find yourself stuck when it comes to actual projects? I created this course for those who can use forEach but hesitate to use reduce, find asynchronous code a headache every time they see it, and build components without knowing the underlying reasons for their structure. This course doesn't just explain syntax. It focuses on "why we use it this way" to help you develop the coding intuition needed to jump straight into real-world work.

Through this course, you will gain experience deploying front-end and back-end projects. You will also gain basic knowledge about Linux and networks while deploying projects!

From TCP/IP to HTTP! This course is prepared for those who lack basic network theory but hope to understand major-level concepts, even if it means "memorizing" them. You can do it!

This course focuses on helping beginner Javascript developers become developers who can develop Real web apps. If you take this course, you can learn the basic concepts related to Vue.js and develop Real web apps. This course is Part 1, Basics, and through Parts 2 and 3, we will implement Real web apps. It is structured so that you can learn easily even if you only know basic simple HTML, without prior knowledge such as Javascript or CSS. By the end of the course, you will definitely be able to do basic coding for Vue.js.

This lecture is the final lecture in the [Web Development Full Stack Course] lecture series for training full-stack web developers, and is a lecture on portfolio project development. By synthesizing everything learned in [Web Development Full Stack Course], you will be able to understand what you have learned while developing an actual web application and directly apply the basic functions.

I have summarized how to create a profitable AdSense website. I have organized it so that even those without development experience can follow along, leaving only successful methods so that they can be replicated exactly.

Digital marketing that makes money, such as Naver Shopping and Coupang Partners, requires consistency, but you can approach it easily and effectively with scientific analysis and automation. We will teach you the key secrets of creating a program that collects and analyzes popular products, keywords, blogs, and shopping information.

Let’s learn about PWA (Progressive Web App), the next-generation mobile strategy of global companies!