What is DNS? Follow a website name to its address
A website name is not a page. Follow a browser’s journey, see what DNS actually does, and learn why a DNS change can take time to appear.
← Back to the concept mapInteractive lesson Interactive lesson Interactive lesson Interactive lesson Technical reference Interactive lesson Technical reference Technical reference Technical reference
Cloud Computing
Start with website names, saved copies, and who runs the servers. Interactive beginner guides lead into practical AWS and CDN tutorials.
Interactive concepts first, then practical references. See each resource’s notes for original dates and software-version limitations.
Why is this page still old? Web caching explained
Change a pretend page and watch its saved copy stay behind. Learn freshness, revalidation, and why refreshing is not always the same as fetching the original.
What does serverless mean? Somebody still runs the servers
Move a traffic slider to compare fixed capacity with managed functions. See what the provider handles, what you still own, and why serverless is not automatically free.
AWS Basics: Create and Connect to EC2 Instances
If you are familiar with the concept of Virtual Machine (VM), you should know that an EC2 instance is basically a VM running on Amazon Web Services (AWS).
AWS Basics: EC2 Instance Types
Elastic Compute Cloud (EC2) Amazon Web Services (AWS) offers a variety of cloud computing services.
The Basics of Serverless and Microservice Architecture
Serverless is a type of cloud computing service model that offers functions as a service (FaaS).
VMware Tutorial: Configure ESXi Host Management Network
VMware ESXi Management Network provides traffic between an ESXi host and clients.
VMware Tutorial: Install and Configure vCenter Server 7
VMware vCenter provides centralized management capabilities for ESXi hosts.
VMware Tutorial: Install ESXi Hypervisor
A hypervisor is software that allows a server to run multiple operating systems.