Exam 312-39 Topic 5 Question 78 Discussion

The HTTP status codes that fall within the range of 1XX represent informational messages. These are provisional responses that indicate the initial part of a request has been received and has not yet been rejected by the server. The server is informing the client that it has received the header of the request and the client should continue to send the request body if it has not already done so. These status codes are used to provide an interim response to the client while the server processes the full request.
References: The EC-Council's Certified SOC Analyst (C|SA) program includes the study of HTTP status codes as part of understanding web server logs and troubleshooting web server issues. The informational responses (1XX status codes) are covered in the curriculum and can be found in the official EC-Council SOC Analyst study guides and courses. The information is also consistent with the standard definitions provided by the Internet Engineering Task Force (IETF) in RFC 9110, as well as other reputable sources such as MDN Web Docs1 and Wikipedia2.