The server does not support the functionality required to fulfill the request.
This is the appropriate response when the server does not recognize the request method and is not capable of supporting it for any resource.
A 501 response is cacheable by default; i.e., unless otherwise indicated by the method definition or explicit cache controls.
Risk deterrence is the process of implementing deterrents to would-be violators of security and policy. Example: Implementing warning banners on your system login pages that only authorized personnel can access those systems.
The server is refusing to process a request because the request payload is larger than the server is willing or able to process. The server MAY close the connection to prevent the client from continuing the request. If the condition is temporary, the server SHOULD generate a Retry-After header field to indicate that it is…
The server is refusing to service the request because the request-target is longer than the server is willing to interpret. This rare condition is only likely to occur when a client has improperly converted a POST request to a GET request with long query information, when the client has descended into a “black hole” of redirection…
Abstraction Abstraction is a protection mechanism concept that provides efficiency. It allows something that is complex to be represented in a simple manner. Example An example of abstraction is having all employees in an organization be classified into groups. After they are classified into groups, each group is assigned security controls, restrictions, or permissions. The…
The target resource has more than one representation, each with its own more specific identifier, and information about the alternatives is being provided so that the user (or user agent) can select a preferred representation by redirecting its request to one or more of those identifiers. In other words, the server desires that the user…
1×× Informational 100 Continue 101 Switching Protocols 102 Processing 2×× Success 200 OK 201 Created 202 Accepted 203 Non-authoritative Information 204 No Content 205 Reset Content 206 Partial Content 207 Multi-Status 208 Already Reported 226 IM Used 3×× Redirection 300 Multiple Choices 301 Moved Permanently 302 Found 303 See Other 304 Not Modified 305 Use Proxy 307 Temporary Redirect 308 Permanent Redirect 4×× Client Error 400 Bad Request 401 Unauthorized 402 Payment Required 403 Forbidden 404 Not Found 405 Method Not Allowed…