HTTP Status Codes

Question 1

This tells the client to continue with the rest of it’s request.

Answer 1

100 Continue

Question 2

This indicates that the server will switch to an updated HTTP version in response to a client request to do so.

Answer 2

101 Switching Protocols

Question 3

The request was successful.

Answer 3

200 OK

Question 4

Your request was successful and resulted in a new resource being created.

Answer 4

201 Created

Question 5

Your request was accepted for processing; however, it may not have yet been processed.

Answer 5

202 Accepted

Question 6

The information returned to you is not from the original source but may be from a third party or be a subset of the original information.

Answer 6

203 Non Authoritative Information

Question 7

The request was successful but the response results in no content.

Answer 7

204 No Content

Question 8

The client should reset the document view.

Answer 8

205 Reset Content

Question 9

The server fulfilled the partial GET request.

Answer 9

206 Partial Content

Question 10

The reply from the server will contain multiple resources the client can choose to redirect to.

Answer 10

300 Multiple Choices

Question 11

This code is used when a resource will never again be available at the previous URI and has been moved to the new resource. Administrators use this code when they want to indicate that a client should point all future requests to the new URI.

Answer 11

301 Moved Permanently

Question 12

Unlike the 301 status, this code denotes a resource that is only temporarily being redirected.

Answer 12

302 Found

Question 13

This is commonly a response to a POST request, where the response can be obtained via a GET request to a different URI.

Answer 13

303 See Other

Question 14

This response is used when the client sends a GET request conditional on the document being modified. This response lets the client know that the document has not changed.

Answer 14

304 Not Modified

Question 15

The server will provide a proxy in its response URI that must be followed to access the requested data.

Answer 15

305 Use Proxy

Question 16

Status code is not yet used.

Answer 16

306 Unused

Question 17

This is similar to a 302 code and is used when the resource the client is requesting can be found under a different URI temporarily, but in the future, the client should use the original URI.

Answer 17

307 Temporary Redirect

Question 18

This code is used in response to bad syntax on the client side.

Answer 18

400 Bad Request

Question 19

This request requires authentication from the user, so the client should repeat the request with proper authentication.

Answer 19

401 Unauthorized

Question 20

Unlike a 401, this request is not allowed from the user, and the client should not attempt to repeat the request with authentication. This error code is often indicative of permissions errors.

Answer 20

403 Forbidden

Question 21

The server couldn’t find the page the client requested. This error code often comes up when the user had a typo in their request. when the request is for a page that has moved without a redirection put in place, or when the file used to exist but has been deleted.

Answer 21

404 Not Found

Question 22

The client took too long to produce a request. You may see this when you are experimenting with the web server troubleshooting over telnet.

Answer 22

408 Request Timeout

Question 23

Unlike a 3xx redirection request, this code is used when the resource used to exist but is now forever gone.

Answer 23

410 Gone

Question 24

The server received some internal error when it was processing the request. You may see this when you have a bug in a CGI or PHP script that causes the file to error out when it is run.

Answer 24

500 Internal Server Error

Question 25

The server doesn’t support the feature the client is requesting.

Answer 25

501 Not Implemented

Question 26

The error shows up when the server is configured as a gateway or proxy device and it received an invalid response when contacting it’s upstream server.

Answer 26

502 Bad Gateway

Question 27

The server is temporarily unavailable to server the client’s request, often due to the server being overloaded or to come sort of maintenance being performed on the server.

Answer 27

503 Service Unavailable

Question 28

The server did not receive a response in time from some upstream server it needed to fulfill the request. The upstream server could be HTTP, but it could also result from a timeout in an upstream FTP, LDAP, or even DNS server.

Answer 28

504 Gateway Timeout

Question 29

Pretty self explanatory; this error code is used when the server does not support the HTTP version the client requests.

Answer 29

505 HTTP Version Not Supported

Question 30

Status codes that start with ____ denote some sort of informational response. This status code range is for HTTP/1.1 and shouldn’t be sent to HTTP/1.0 clients. (NOTE: the spaces in this definition do not indicate what the answer is, but rather, the words were redacted so as to mask what the answer might be.)

Answer 30

1xx Informational Codes

Question 31

A status code that starts with ____ denotes a successful request. Ideally, if you are troubleshooting a web server, this is the kind of response you want to see. The most common of these status codes is ____ ____, which indicates a successful request. (NOTE: the spaces in this definition do not indicate what the answer is, but rather, the words were redacted so as to mask what the answer might be.)

Answer 31

2xx Successful Codes

Question 32

When the status code starts with a ____, it denotes some sort of redirection message from the server to the client. Administrators often use this sort of response when the have moved content from on URL to another, to move you from one domain to another, or even to redirect you to use HTTPS instead of HTTP. (NOTE: the spaces in this definition do not indicate what the answer is, but rather, the words were redacted so as to mask what the answer might be.)

Answer 32

3xx Redirection Codes

Question 33

When you are troubleshooting server problems, you are likely to run into some error codes that start with ____. This status code family deals with errors the server believes are on the client side. The most common of these errors is ____, which is returned when a client requests a page that doesn’t exist.

Answer 33

4xx Client Error Codes

Question 34

Like 4xx status codes, ____ status codes deal with errors, only in this case the error is likely on the server side. If you are the web server administrator and you see these kinds of error codes, you will want to dig into your web server error logs for more information on the cause of the errors.

Answer 34

5xx Server Error Codes