Review the definitions for terms used across Cloudflare's documentation.
| Term | Definition | Product |
|---|---|---|
| account | Accounts group one or more members together with specific roles or permissions. Accounts can be associated with any number of domains. | Fundamentals |
| ACK (Acknowledge) | The final step in the TCP three-way handshake, confirming the establishment of a connection. | Spectrum |
| active zone | A DNS zone that is active on Cloudflare requires changing its nameservers to Cloudflare's for management. | DNS |
| address map | A data structure enabling customers with BYOIP prefixes or account-level static IPs to specify which IP addresses should be mapped to DNS records when they are proxied through Cloudflare. | BYOIP |
| AI crawler | A bot which scrapes content from websites in support of an AI model, including by scraping content for indexing, retrieval augmented generation, or training. | AI Crawl Control |
| AI models | An AI model is a trained system that processes input data to generate predictions, decisions, or outputs based on patterns it has learned. | Workers AI |
| alarm | A Durable Object alarm is a mechanism that allows you to schedule the Durable Object to be woken up at a time in the future. | Durable Objects |
| allowlist | An allowlist is a list of items (usually websites, IP addresses, email addresses, etc.) that are permitted to access a system. | WAF |
| anycast | Anycast is a network addressing and routing method in which incoming requests can be routed to a variety of different locations. Anycast typically routes incoming traffic to the nearest data center with the capacity to process the request efficiently. | Cloudflare WAN |
| apex domain | Apex domain is used to refer to a domain that does not contain a subdomain part, such as | DNS |
| API call | Also known as an API request. An API call is a message sent to a server asking an API to provide a service or information. | API Shield |
| API endpoint | The API endpoint is the location where API calls or requests are fulfilled. API Shield defines endpoints as a host, method, and path tuple. | API Shield |