What is a requirement for an HTTP request?

A requirement for an HTTP request is a named URI representing a resource because the URI (Uniform Resource Identifier) specifies the resource that the request is intended to interact with. In the context of web technologies, an HTTP request needs to target a specific location—whether that's for fetching data, submitting information, or performing any other operation on a server's resources. The URI serves as the means for the client (e.g., a web browser or an application) to identify and communicate with the resource over the internet.

In contrast, while valid JSON schemas, client certificates, and static IP addresses may be relevant in specific contexts or applications, they are not universal requirements for every HTTP request. For instance, not all HTTP requests require JSON formatting or schema validation; they might use other data formats like XML or plain text. Additionally, client certificates are primarily necessary for mutual TLS authentication in secure communications, and a static IP address might not be needed for a client to perform simple HTTP requests. Hence, the URI is essential and required for any HTTP request to function correctly.