What Is a Server?
A server is a computer that provides services to other computers. Learn about web servers, mail servers, and how servers keep running 24/7 — with diagrams.
Cloud & Servers Articles
20 articles · in orderWhere Does a Website Actually Run?
Websites run on either a shared hosting server, a VPS, or the cloud. Learn the differences between each option, how to choose, and what's inside a data center.
What Is a Data Center?
YouTube, Instagram, and LINE all run inside massive data centers. Learn how data centers work, how big they are, and what role they play — explained with diagrams.
What Is the Cloud?
You hear about "the cloud" all the time, but what does it actually mean? Learn the concept, how it differs from storing files on your own PC, and the most popular cloud services.
What Is a VPS?
A VPS (Virtual Private Server) sits between shared hosting and the cloud — your own dedicated server for as little as a few hundred yen per month. Learn how it works and what you can do with it.
Intro to AWS
AWS (Amazon Web Services) is the world's #1 cloud. Netflix, Nintendo, and JAL all use it. Learn the big picture, the key services, and how to start for free as a student.
Intro to Azure
Azure is Microsoft's cloud — world #2 in market share, with deep integration with Windows and Office. Learn Azure's features, key services, and how to get started, explained with diagrams.
What Is Google Cloud?
Google Cloud (GCP) is Google's cloud service, ranked #3 globally. Built on the same tech that powers Search, YouTube, and Gmail, it's growing fast in AI and data analytics. Explained for upper-elementary through high school.
How to Get Your Own Server
Want your own server? There are 4 options — from shared hosting starting around ¥100/month to setting up a PC at home. Compare cost and difficulty for upper-elementary through high school.
How to Register a Domain
A domain is your address on the internet. Learn how domains work, how to register one, and how to choose the right one — explained with diagrams.
How to Publish a Website
Learn every step to publish your own website for the world to see — write HTML, upload to a server, set up a domain, and enable SSL. Explained with diagrams.
What Is SSL?
Discover what the padlock icon in your browser address bar really means. Learn how SSL encrypts web traffic, the difference between http and https, and how to get a free certificate — explained with diagrams.
What Is a CDN?
YouTube and Netflix stream smoothly worldwide thanks to CDNs. Learn how a Content Delivery Network caches copies close to each user — explained with diagrams.
How to Host WordPress
WordPress powers a huge share of the web. Compare three hosting options — shared hosting, VPS, and WordPress.com — and learn the best way to get started.
How to Choose a Cloud Backup Service
Protect your data before your PC breaks. Compare Google Drive, iCloud, OneDrive, and Dropbox, and learn how you can pick the right backup service.
What Happens When a Server Goes Down?
LINE won't send, X is unreachable, you can't log into your game — what is actually happening when 'the server is down'? Causes and mechanics explained with diagrams.
What Does a Server Admin Do?
Server admins (infrastructure engineers, SREs) keep web services running 24/7. Learn what the job involves, what a typical day looks like, and the skills you need — explained with diagrams.
Why Learn Cloud?
Four big reasons to learn cloud computing: broader career options, higher salaries, flexible work styles, and the ability to publish your own projects worldwide — explained with diagrams.
What Cloud Certifications Exist?
An overview of the main cloud certifications from AWS, Azure, and GCP — from beginner levels accessible to beginners up to practitioner-grade exams, with difficulty, cost, and study tips.
Why Cloud Skills Stay Valuable
Cloud professionals are in demand for at least the next decade. Market growth, AI synergy, and the difficulty of replacing human judgment — why cloud skills hold their value, explained with data.