IT Glossary & Dictionary

A cloud service model providing virtualized computing resources like servers, storage, and networking over the internet.

A framework for managing digital identities and controlling who can access which cloud resources and services.

A network protocol used for diagnostic and error reporting, including ping and traceroute functionality.

A property where performing an operation multiple times produces the same result as performing it once.

A deployment strategy where new versions replace existing instances entirely rather than updating them in place.

An approach where servers are never modified after deployment — changes require building and deploying entirely new server instances.

An object whose state cannot be modified after creation, providing thread safety and predictable behavior in concurrent systems.

The process of detecting, responding to, and resolving service disruptions to minimize impact and restore normal operations.

A data structure that improves the speed of data retrieval operations on database tables at the cost of additional storage.

The practice of managing infrastructure through machine-readable configuration files rather than manual processes.

The divergence between the actual state of infrastructure and its defined desired state, caused by manual changes or untracked modifications.

A data structure in Unix filesystems that stores metadata about a file, excluding its name and data.

The process of verifying that user-supplied data meets expected formats, types, and ranges before processing it.

A unique numerical label assigned to each device on a computer network for identification and communication.

The traditional Linux firewall tool that filters network packets using configurable chains of rules organized in tables.

The latest version of the Internet Protocol with 128-bit addresses, designed to replace IPv4 and solve address exhaustion.

An open-source service mesh that provides traffic management, security, and observability for microservices on Kubernetes.