An HTTP response code is a three-digit number in an HTTP response that indicates whether the corresponding client request is being processed, succeeded, redirected, or failed. It appears in the response start line alongside a short name. section 23.2.2
The first digit identifies the response category:
- 1xx informational: the request has begun processing and further action may follow. section 23.2.2
- 2xx successful: the request was understood and processed as expected. section 23.2.2
- 3xx redirection: additional steps are required to complete the request. section 23.2.2
- 4xx client error: the request is invalid, infeasible, or unauthorized. section 23.2.2
- 5xx server error: the server cannot fulfill an otherwise apparently valid request. section 23.2.2
Creating an ACL rule
A client sends a POST request to an SDN controller to create an ACL rule. After creating it, the server returns 201 Created, confirming that the request succeeded and a new resource was created. section 23.2.2
