qualifier: A metadata item as specified in [DMTF-DSP0004] section 4.5.4. This consists of a simple name, a type, a value, and a flavor (a propagation rule for the qualifier).
Quality of Service (QoS): A set of technologies that do network traffic manipulation, such as packet marking and reshaping.
quick format: A formatting that does not zero the data sectors on the volume at the time the file system metadata is created.
quick mode (QM): The second phase of an Internet Key Exchange (IKE) negotiation, during which the peers negotiate quick mode security associations (quick mode security association (QM SA)). For more information, see [RFC2409] section 5.5.
quick mode security association (QM SA): A security association (SA) that is used to protect IP packets between peers (the Internet Key Exchange (IKE) traffic is protected by the main mode security association (MM SA)). For more information, see [RFC2409] section 5.5.