Servers have a way to communicate for informing about queries’ status. They do that through different HTTP response status codes, like the error 404.
Once servers receive a query, they start a process to answer the client with the required website. Using different codes, they indicate if it was successfully completed or not, if there was an error and its type, etc. There are five categories of responses.
- 1, informational responses.
- 2, successful responses.
- 3, redirects.
- 4, client errors.
- 5, server errors.