5xx Server Error -
The site has used up its allocated data transfer for the period. Why This Matters (Impact)
The server took too long to get a response from an upstream server. Bandwidth Limit Exceeded 5xx Server Error
One server received an invalid response from another server it was trying to talk to. Service Unavailable The site has used up its allocated data
The server is temporarily overloaded or down for maintenance. Gateway Timeout 5xx Server Error