Quration AIQ

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Not every broken webpage is actually your fault — some error messages are quietly confessing the problem lies elsewhere entirely.

Whose fault is it?

The server's (the site operator's) — not yours
5xx codes are internal server failures; all you can do is refresh and wait. 4xx codes (404, 403) point back at the request. Knowing this split keeps you calm during outages.

5xx status codes mean the problem lies with the server itself, meaning the site's own systems failed to process the request, and there is nothing on the visitor's end that caused it or can fix it beyond refreshing and waiting for the operator to resolve it. This is distinct from 4xx codes, like 404 or 403, which point back at the request itself, such as a wrong address or lack of permission.

Rebooting your own computer or blaming an unpaid internet bill are both misdiagnoses that assume the fault sits with the visitor, when a 5xx error signals the failure is on the server's side, not yours.

Understanding this split between 4xx and 5xx errors is genuinely useful during outages, since a 5xx code tells you immediately that the problem is out of your hands and there's no fix on your end.

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