> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/glossary/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/glossary/a/anycast-ip.md). # Anycast IP Anycast IP is a networking technique that allows a single IP address to be assigned to multiple devices or servers in different physical locations. When a client sends a request to the anycast IP address, the request is routed to the nearest server or device that is part of the anycast group, based on the routing protocol used by the network. Anycast IP is often used to improve the reliability and performance of network services, such as DNS. By using anycast IP, requests are routed to the nearest server or device, reducing the latency and improving the response time. It also provides redundancy and load balancing, as traffic can be distributed across multiple servers or devices in different locations. Anycast IP is different from unicast and multicast IP. Unicast IP is used to address a single network interface, while multicast IP is used to address a group of devices that are interested in receiving a specific message. Anycast IP, on the other hand, is used to address a group of devices that offer the same service or content, but are located in different physical locations. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.console.zenlayer.com/glossary/a/anycast-ip.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.