AWS Networking Fundamentals for On-Premises Engineers: What You Need to Know Before Creating Your First VPC

A reintroduction to high school mathematics that starts with nothing more than your memory of middle school math. The course is reorganized according to the causal relationships between concepts rather than the textbook order, so you first understand why each formula is needed. Designed to be completed in 24 weeks with 30 minutes a day, it helps working professionals and adult learners build a solid foundation in the mathematical concepts they encounter at work and in everyday life.

Diagnose cost leakage in a Kubernetes cluster and learn the decision criteria and validation methods needed before introducing automation tools. Validate key cost-saving techniques such as Karpenter, Spot Instances, and Workload Optimization in read-only mode, then practice the entire process of safely applying them to production and rolling them back.

Learn the core principles of writing prompts to get the desired results from AI. Increase the accuracy of your requests through template-based structuring, and master a repeatable prompt design process through step-by-step verification and Git storage. Compare good and bad examples directly to develop request-writing skills that can be applied immediately in real-world work.

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.

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 a hands-on course for systematically designing and building a multi-account environment based on AWS Organizations. It covers the entire landing zone implementation process, from designing the OU structure and Transit Gateway network architecture to the criteria for choosing between Control Tower and LZA, as well as strategies for incorporating existing accounts. Beyond simple console operations, you will develop the ability to make design decisions suited to your organization’s circumstances and establish an operational governance framework.

Identify the causes of weight-loss failure in environmental structures rather than willpower, and learn realistic weight-loss rates and goal-setting methods. Understand the mechanisms behind weight regain and learn a scientific approach to designing long-term success through sustainable environmental changes.

Learn stress management methodologies proven in 20 years of infrastructure operations. Instead of abstract advice, learn concrete procedures for recovering your mental resilience amid incident response, deadlines, and organizational change using actionable tools and worksheets. Learn how to set and maintain a minimum baseline you can keep, rather than a perfect routine.

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.

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.

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.

To ensure you are no longer afraid of the black screen, we will practice everything from server access to log checking and resource monitoring using only the 21 essential commands. You will start immediately in a web environment, learning everything from how to exit vi to hands-on practical inspection routines.

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

Understand the interpretation step that exists between events and emotions, and identify your own patterns of cognitive distortion. Through exercises in naming and rating the intensity of emotions, along with three-column recording, learn practical skills for handling emotions without being overwhelmed by them.

From installing the editor to initial Git configuration, you will personally build the entire development environment from start to finish. This is a practical, hands-on course where you will master terminal commands and folder structure principles, create your first project folder, and complete your first commit. In just one day, you will establish a stable development environment to be used throughout the entire 12-week program.

Without memorizing the 50 full sentences learned in the introductory course anew, you will expand your skills through training in speaking at length. Building on the ability to respond with a sentence reflexively, you will connect your thoughts for 30 seconds or more and ultimately develop the practical conversational ability to speak continuously about a single topic on your own for 3 minutes.

Analyze why your soccer skills have plateaued and learn how to overcome stagnation by understanding the principles of step-by-step growth. Through actionable routines—15-minute weekday training sessions, setting one goal per match, and writing a three-line post-match review—you can steadily improve your skills without additional time or expense.

Connect the history from Gojoseon to the present day in a single thread through context rather than memorization. Learn how to read historical sources, understand the background of historical stories encountered in the news, dramas, and travel, and reinterpret history from the perspective of working people in this liberal arts course.

This is a practical calculation process that establishes criteria based on the fundamental theorem of polynomials, reconstructs multiplication formulas using area diagrams, and streamlines division through synthetic division. The focus is on developing accurate organization habits and self-checking skills rather than calculation speed. It minimizes boredom and emphasizes connections to subsequent units to maintain learning motivation.

This course is about redesigning the way you work—not just the tools you use. You’ll diagnose three sources of wasted time: delayed starts, rework, and overwork, then build a repeatable work system using templates, standards, and checklists. Through a principles-based approach applicable across roles, you’ll learn how to improve both the speed and quality of your work.

This course covers the basics of Amazon EKS, an AWS-managed Kubernetes service, designed for beginner Amazon EKS users.

[Reflecting the latest related regulations and guidelines presented by the Korea Financial Security Institute, Financial Supervisory Service, and Personal Information Protection Commission] In the rapidly changing digital financial environment, security has become not an option but a core survival strategy. This course covers the new directions of financial security changing with digital transformation, strategic response methods, and practical approaches to establishing a security culture within organizations. We will examine the policy directions of the Korea Financial Security Institute, the latest regulatory trends, and global security trends together, learning security innovation strategies centered on people and organizations beyond technology-focused approaches.

Let's leverage AWS's key networking services to build everything from simple, basic networks to multi and hybrid networks, understand traffic flow in the architecture, and develop the skills and confidence to implement real cloud networks ourselves.

This is a beginner level network course that solidifies the fundamentals of networks through packet tracer practice.

Network: Easily understood with pictures. Save your time with 'pictures' and 'animations'!

We have gathered all the essential network theories that those planning to operate services in an AWS environment must know. Through this course, you can understand the principles of how AWS VPC (Virtual Private Cloud), composed of private networks using Private IPs, works and gain a detailed understanding of the roles of services such as ALB and NLB.

This is a hands-on introductory course for AWS cloud beginners that follows and learns basic AWS cloud network knowledge.

**"Digital Forensic Techniques by Byte Detective: Evidence Collection and Securing"** is a course focused on how to collect and preserve digital evidence required in cases of cybercrime, internal information leakage, and security incidents. From the basic concepts of digital forensics to the principles of evidence collection, maintaining integrity, and legal procedures for securing evidence, this course explains everything through case studies and procedural steps so that even beginners can understand. You can systematically learn the forensic mindset and core concepts of securing evidence that are essential to know before using professional analysis tools.

Arduino? Coding? You don't need to know anything. Just invest a little bit of your free time and you'll find something amazing.

Learn the core HTTP features essential for practical use and how to design proper HTTP APIs.

Creating a simple Omok game using Unity and a C# server

A course where you can understand core network concepts and train to explain them verbally for interviews.

This training will help you understand the world-famous cloud, build your own cloud environment, and strengthen your ability to use it easily.

[Introduction to Security Incident Response: Learning through Scenarios of Web Server Hacking, Ransomware, and Account Takeover] This course examines why various information security incidents—such as web server hacking, ransomware, account takeover, and internal penetration—occur and how they spread, categorized by incident type. Students will follow each incident scenario to understand the attack flow, analyze the core causes of the incident, and learn how to resolve issues and prevent recurrence through security architectures such as firewalls, DMZ, access control, privilege management, backup, and log monitoring. Rather than a simple explanation of security concepts, this is a scenario-based introduction to information security that provides a comprehensive understanding from root cause analysis to resolution strategies.

For those aiming to pass the "Network Specialist Examination": This course is a learning program that condenses only the key points of the IPA Network Specialist Examination. It focuses on themes directly connected to passing the exam and is designed to help you acquire knowledge efficiently. Rather than emphasizing volume, we carefully select and explain "the essential parts you must master to pass"! Let's work hard together toward passing the Network Specialist exam!

This is Part 1 of a roadmap course that neatly organizes, in a short amount of time, the essential computer science (CS) knowledge you need to excel at development and data. This course has also been used for years as an in-house course at top companies in Korea. Based on 20 years of experience in the field, ranging from systems software to web and app development and data science, this course systematically and thoroughly covers the core concepts you need to excel at development and data—while keeping them easy to understand.

Learn about the network multiplayer framework, also known as the other Unreal Engine. Learn the key concepts, inner workings, and optimization techniques you need to know when creating a network multiplayer game, then create a hack & slash type PvP battle game.

This course does not simply list concepts. 👉 It explains the entire flow of IT systems based on "how a service actually operates." User Request → Server Processing → Data Storage → Result Return Web/App → API → DB → Cloud 👉 Centered around this flow, it connects where, why, and how each technology is used.

If you've been studying information security, you've probably had this thought at least once: "Firewall, CSPM, SIEM... I've heard the names, but I'm not exactly sure what they do." This course is designed to help beginners in information security clearly grasp the concept of the 'security solution landscape.' From the concepts and key features of each solution to their pros and cons, use cases, and the latest trends... With a total of 23 lectures, why not clear up the vagueness surrounding security solutions right now?