Cyber Glossary - Q

Quadrant – Short name referring to technology that provides tamper-resistant protection to cryptographic equipment. (CNSSI-4009) (NISTIR 

Qualitative Assessment – Use of a set of methods, principles, or rules for assessing risk based on nonnumeric categories or levels. (SP 800-30) (NISTIR)

Quality of Service – The measurable end-to-end performance properties of a network service, which can be guaranteed in advance by a Service-Level Agreement between a user and a service provider, so as to satisfy specific customer application requirements. Note: These properties may include throughput (bandwidth), transit delay (latency), error rates, priority, security, packet loss, packet jitter, etc. (CNSSI-4009) (NISTIR)

Quantitative Assessment – Use of a set of methods, principles, or rules for assessing risks based on the use of numbers where the meanings and proportionality of values are maintained inside and outside the context of the assessment. (SP 800-30) (NISTIR)

Quantum Computer - A collection of interacting quantum mechanical systems, such as superconductors or trapped ions, that can be manipulated to process information. SOURCE: Cyberspace Solarium Commission Final Report, 2020

Quarantine – Store files containing malware in isolation for future disinfection or examination. (SP 800-69) (NISTIR)