One of several states in which an information system (IS) may operate, and the only one in which certain privileged instructions may be executed. Such privileged instructions cannot be executed when the system is operating in other (e.g., user) states. Synonym supervisor state. [INFOSEC-99]

An organization, activity, or person included in the collective address group of a message and deemed by the message originator as having no need for the information in the message.
Note: Exempted addressees may be explicitly excluded from the collective address group for the particular message to which the exemption applies.

[A] key used exclusively to safeguard communications transmitted over the air during military or organized civil training exercises. [INFOSEC-99]

A trial-and-error attempt to violate computer security by systematically attempting to use a very large number of possible passwords or keys. [After 2382-pt.8] Synonym [loosely] brute-force attack.

Synonym [in ITU-T usage] distribution-quality television.

A device that restores the dynamic range of a compressed signal to its original dynamic range.

The restoration of the dynamic range of a compressed signal to its original dynamic range.

The inherent limit for increasing the capacity of a system beyond its installed capacity.

The term "Expected Measured Loss" denotes a calculated loss which specifies the end-to-end 1004-Hz loss on a terminated test connection between two readily accessible manual or remote test points. It is the sum of the inserted connection loss and test access loss including any test pads.

In layered systems, a service data unit that is delivered to a peer entity in the destination open system before the delivery of any subsequent service data unit sent on that connection.