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HTTP Status Codes
For learning HTTP status codes.
17
Computer Networking
Not Applicable
01/24/2021

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Cards

Term
1xx
Definition
Informational Response

The request was received, continuing process.
Term
2xx
Definition
Successful

The request was successfully received, understood, and accepted.
Term
3xx
Definition
Redirection

Further action needs to be taken in order to complete the request.
Term
4xx
Definition
Client Error

The request contains bad syntax or cannot be fulfilled.
Term
5xx
Definition
Server Error

The server failed to fulfill an apparently valid request.
Term
200
Definition
OK

Standard response for successful HTTP requests.
Term
301
Definition
Moved Permanently

This and all future requests should be directed to the given URI.
Term
302
Definition
Found (Previously "Moved temporarily")

Tells the client to look at (browse to) another URL. 302 has been superseded by 303 and 307.
Term
303
Definition
See Other

The response to the request can be found under another URI using the GET method.
Term
307
Definition
Temporary Redirect

In this case, the request should be repeated with another URI; however, future requests should still use the original URI.
Term
400
Definition
Bad Request

The server cannot or will not process the request due to an apparent client error.
Term
401
Definition
Unauthorized

Similar to 403 Forbidden, but specifically for use when authentication is required and has failed or has not yet been provided.
Term
403
Definition
Forbidden

The request contained valid data and was understood by the server, but the server is refusing action.
Term
404
Definition
Not Found

The requested resource could not be found but may be available in the future.
Term
451
Definition
Unavailable For Legal Reasons

A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource.
Term
500
Definition
Internal Server Error

A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.
Term
503
Definition
Service Unavailable

The server cannot handle the request (because it is overloaded or down for maintenance).
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