Eccouncil Exam 212-89 Topic 3 Question 37 Discussion

A US Federal Agency network was the target of a DoS attack that prevented and

impaired the normal authorized functionality of the networks. According to agency's

reporting timeframe guidelines, this incident should be reported within 2 h of

discovery/detection if the successful attack is still ongoing and the agency is unable to

successfully mitigate the activity.

Which incident category of US Federal Agency does this incident belong to?