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  1. Many sources start to generate traffic far beyond the design parameters for the network. This can be an intentional and coordinated attack. However in most cases this is actually an uncoordinated spike in demand caused by some event, such as an natural disaster/emergency, a tele-vote for a reality TV show or some other "mass calling" event.
  2. The AS is generally a COTS platform with minimal hardware assist to protect against very high packet/request rates. It gets overloaded and becomes unresponsive with rates much higher than its rated capacity.
  3. For mass calling events, the 
    Spacevars
    0product
     reduces the total traffic down to a level that can be managed by the Application Servers / core network. All subscribers are impacted, based on the traffic prioritization.

 

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