What response codes do you know?

In the context of the HTTP protocol, the most common response codes are divided into several categories:

• 1xx (Informational): for example, 100 Continue — the server has received the initial part of the request and the client can continue.
• 2xx (Success): 200 OK — the request was successfully processed; 201 Created — the resource has been created.
• 3xx (Redirection): 301 Moved Permanently — the resource has been permanently moved; 302 Found — temporary redirect.
• 4xx (Client errors): 400 Bad Request — the request was invalid; 401 Unauthorized — authentication is required; 403 Forbidden — access is denied; 404 Not Found — the resource was not found.
• 5xx (Server errors): 500 Internal Server Error — internal server error; 503 Service Unavailable — the service is temporarily unavailable.

Knowing these codes is important for proper response handling in web development and system integration.