Which of the following is NOT one of the common types of HTTP methods?

The correct response identifies that "CONNECT" is not one of the more commonly used HTTP methods compared to the others listed. In web communication, the primary HTTP methods are GET, POST, PUT, DELETE, and PATCH, with GET being used to retrieve data from a server, PUT to update existing resources, and DELETE to remove specified resources.

The CONNECT method is indeed defined in the HTTP/1.1 protocol, and it is used to establish a tunnel to the server identified by the URI. While it serves specific purposes—mostly in proxy and web tunneling scenarios—it is far less frequently utilized than methods like GET, PUT, and DELETE, which are integral to standard web and RESTful API interactions. Thus, when considering the most common HTTP methods in everyday application development and integration scenarios, CONNECT does not rank among them, distinguishing it from the others in the question.