Glossary

Type to filter the 18 terms.

AMI: Amazon Machine Image – a template (root volume snapshot + launch settings) used to launch EC2 instances.
Auto Scaling group: A set of EC2 instances that AWS grows or shrinks automatically between a minimum and maximum size.
Availability Zone: One or more isolated data centres inside a Region, with independent power and networking.
Bucket: A top-level S3 container for objects; its name is globally unique.
CDN: Content Delivery Network – caches content in edge locations close to users (e.g. CloudFront, Cloudflare).
CIDR: Classless Inter-Domain Routing notation, e.g. 10.0.0.0/16, describing an IP range by prefix length.
EBS: Elastic Block Store – network-attached block volumes for EC2 that persist independently of the instance.
Elasticity: Automatically adding and removing capacity as demand changes, paying only for what is used.
ELB: Elastic Load Balancing – spreads incoming traffic across healthy targets such as EC2 instances.
IaaS: Infrastructure as a Service – rent virtual machines, storage and networks and manage the OS yourself.
Idempotent: An operation that leaves the same final state no matter how many times it runs.
PaaS: Platform as a Service – deploy code or files and let the provider run the platform (e.g. Cloudflare Pages).
Region: A geographic area with multiple Availability Zones, e.g. eu-north-1 (Stockholm).
Scalability: The ability to handle more load by adding resources (vertically or horizontally).
Security group: A stateful virtual firewall attached to an instance's network interface.
Snapshot: A point-in-time, incremental backup of an EBS volume stored in S3.
Static website: A site served as fixed files (HTML, CSS, JS, images) with no server-side code.
VPC: Virtual Private Cloud – your logically isolated network inside AWS.