Tartalomtípusfejléc

Tartalomtípus-fejléc is a Hungarian term that translates to "Content-Type header" in English. This is a fundamental component of the Hypertext Transfer Protocol (HTTP), the communication protocol used for data transmission on the World Wide Web.

The Content-Type header is a field that the sender of a message, typically a web server responding to a browser's request, uses to indicate the media type of the resource being sent. This tells the recipient, usually the browser, how to interpret and process the data. For example, if a server sends back HTML content, the Content-Type header will specify `text/html`. If it's a JPEG image, it will be `image/jpeg`.

Common values for the Content-Type header include `text/html`, `text/css`, `application/javascript`, `image/png`, `image/jpeg`, `application/json`, and `application/xml`, among many others. The header also often includes a character encoding, such as `charset=utf-8`, to ensure that text characters are displayed correctly.

Without the Content-Type header, a web browser would have no way of knowing whether the incoming data is text, an image, a video, or any other type of file, making it impossible to render web pages or display multimedia content accurately. It plays a crucial role in the client-server communication model of the internet.