Senses

Distributed Denial of Service · SynAc

TERM

Distributed Denial of Service

A distributed denial-of-service (DDoS) attack uses many systems to overwhelm a target and degrade availability.

Updated

Jan 06, 2026

Senses

Distributed availability attack

DDoS attacks distribute traffic or requests across many sources (botnets, reflected/amplified traffic) to saturate bandwidth or exhaust application resources. Defenses include upstream filtering and traffic engineering.

NIST CSRC Glossary

Bibliography

NIST CSRC Glossary
Accessed Jan 05, 2026Summarized
NIST CSRC Glossary — Distributed denial of service
https://csrc.nist.gov/glossary/term/distributed_denial_of_service
NIST states most site information is public information and may be distributed or copied, except material marked as copyrighted; attribution requested. Verify per-document markings before quoting.
Source: NIST CSRC Glossary (csrc.nist.gov).

Sense 2

A denial of service technique that uses numerous systems to perform the attack simultaneously.

NICCS (CISA) Cybersecurity Vocabulary

Bibliography

NICCS (CISA) Cybersecurity Vocabulary
Accessed Jan 06, 2026Quoted
NICCS glossary export (CSV)
https://niccs.cisa.gov/rest/vocab/export-csv
NICCS is a CISA (DHS) program. Individual glossary entries include a "From" attribution (e.g., CNSSI 4009, NIST SPs, NICE Framework). Treat "From" values as upstream provenance and verify before quoting large portions of text.
Source: NICCS (CISA) Cybersecurity Vocabulary (niccs.cisa.gov).