Controlling the load into your services and applications:
Administrators are occasionally faced with the task to size their applications farms properly so it can sustain network growth for the years to come.
The lesson to be learned here is: You can do everything right when sizing your application/service, but you need to be ready for the unpredictable.
What is the unpredictable? Attacks and legitimate traffic peaks.
Simple but effective tricks what you can do at the network level when the servers have difficulties coping with load.