Denial of Service (DoS/DDoS) is a cyber attack or system failure that disrupts or prevents authorized access to digital resources, delaying or halting operations critical to functionality.
For information about DoS/DDoS, please view guidance on this topic from the following resources:
- the U.S. Department of State;
- the U.S. Department of Homeland Security;
- the National Institute of Standards and Technology (NIST).