Cybersecurity Lexicon

CHAPTER 18

Q

quadrant: Short name referring to technology that provides tamper-resistant protection to cryptographic equipment. SOURCE: CNSSI-4009

qualitative assessment: Use of a set of methods, principles, or rules for assessing risk based on nonnumeric categories or levels. SOURCE: SP 800-30

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. These properties may include throughput (bandwidth), transit delay (latency), error rates, priority, ...