Can anyone please tell me what this message means?

[Ni]

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
Apache/*.*.** (Ubuntu) Server at [ ].com Port **
I forgot to mention the " * " mean numbers.
Also could it be the laptop connected to the wireless? It runs a Ubuntu operating system.

[Mark]

It could mean anything, someone could be ddosing a website and it's down because of that, also administrator could have set a limit of connections..

[abraXus]

it's a server error....

a server is a computer that serves packets of information to users on a network
error means something went wrong

so a server error means something went wrong on the server

[Angeleyes]

It's a server problem.