HTTP Status Code 416 refers to Range Not Satisfiable. This status code indicates that the server cannot fulfill a range request made by the client because the specified range is not valid or exceeds the size of the resource.
When a client sends a request that includes a Range header to request a specific portion of a resource, the server checks if the requested range can be satisfied. If it can't, it responds with 416, informing the client that the requested range cannot be provided. This helps maintain clarity and control over data retrieval, particularly for large files where clients may want to download only specific segments.