Technology terms starting with S

2,256 terms

symmetric cryptography Cryptography in which the same key is used for encryption and decryption. [2382-pt.8]
symmetric encryption A common key and mathematical algorithm used to both encrypt and decrypt a message.
Symmetric Encryption Algorithm Encryption algorithms using the same secret key for encryption and decryption.
Symmetric Key A cryptographic key that is used to perform both the cryptographic operation and its inverse, for example to encrypt and decrypt, or create a message…
symmetric property If a property P is symmetric, and the property relates individual a to individual b then individual b is also related to individual a via property P.
symmetrical channel A channel in which the send and receive circuits have the same data signaling rate.
symmetrical pair A balanced transmission line, in a multipair cable, having equal conductor resistances per unit length, equal impedances from each conductor to earth, and…
Symmetrix device number The unique device number that identifies an EMC logical volume.
symmetry The attribute describing the relationship of information flow between two (or more) access points or reference points involved in a communication.
SYN Acronym for synchronous idle character.
sync pulse Synonym synchronization pulse.
synchronism The state of being synchronous. 2. For repetitive events with the same, multiple, or submultiple repetition rates, a relationship among the events such…
Synchronization For data streams, the process whereby a received set of data is placed in one to one correspondence with the data assumed to have been transmitted.
synchronization bit A bit used to achieve or maintain synchronism. Note: The term "synchronization bit" is usually applied to digital data streams, whereas the term…
synchronization code In digital systems, a sequence of bits introduced into a transmitted signal to achieve or maintain synchronism.
synchronization pulse A pulse used to achieve or maintain synchronism. Note: The term "synchronization pulse" is usually applied to analog signals, whereas the term…
synchronized A keyword in the Java programming language that, when applied to a method or code block, guarantees that at most one thread at a time executes that code.
synchronized statement A statement in which an object-lock must be obtained for the target object before the body of the statement can be entered.
synchronizing Achieving and maintaining synchronism. 2. In facsimile, achieving and maintaining predetermined speed relations between the scanning spot and the…
synchronizing pilot In FDM, a reference frequency used for achieving and maintaining syntonization of the oscillators of a carrier system or for comparing the frequencies or…
synchronizing signal In facsimile systems, the signal that maintains predetermined speed relations between the scanning spot and recording spot within each facsimile scanning…
synchronous Programming in which the orderly sequence of events can be determined; that is, when things happen one after the other, not at the same time.
synchronous crypto-operation [A] method of on-line crypto-operation in which crypto-equipment and associated terminals have timing systems to keep them in step. [INFOSEC-99]
synchronous data link control (SDLC) In a data network, a bit-oriented protocol for the control of synchronous transmission over data links.
synchronous data network A data network in which synchronism is achieved and maintained between data circuit-terminating equipment (DCE) and the data switching exchange (DSE), and…
synchronous data replication Each data replication I/O waits for the preceding I/O to complete before beginning another replication.
synchronous height See synchronous orbit.
synchronous idle character (SYN) A transmission control character used in synchronous transmission systems to provide a signal from which synchronism or synchronous correction may be…
synchronous network A network in which clocks are controlled to run, ideally, at identical rates, or at the same mean rate with a fixed relative phase displacement, within a…
synchronous optical network See SONET.
synchronous orbit Any orbit in which an orbiting object has a period equal to the average rotational period of the body being orbited, and in the same direction of rotation…
synchronous payloads Payloads derivable from a network transmission signal by removing integral numbers of bits in every frame, i.e.
Synchronous Replication In synchronous replication, each write to the primary disk and the secondary (remote) disk must be complete before the next write can begin.
synchronous satellite A satellite in a synchronous orbit.
synchronous system A system in which events, such as signals, occur in synchronism. Note 1: An example of a synchronous system is one in which a transmitter and receiver…
synchronous tandem encoding A transcoding of the form ADPCM-PCM-ADPCM (adaptive differential pulse code modulation-pulse code modulation-adaptive differential pulse code modulation)…
synchronous TDM A multiplexing scheme in which timing is obtained from a clock that controls both the multiplexer and the channel source.
Synchronous Test Line (103) The term "Synchronous Test Line" denotes an arrangement in an end office which performs marginal operational tests of supervisory and ring-tripping…
synchronous transfer mode In a Broadband Integrated Services Digital Network (B-ISDN), a proposed transport level technique in which time-division multiplexing and switching is to…
synchronous transmission Digital transmission in which the time interval between any two similar significant instants in the overall bit stream is always an integral number of…
synchronous transport signal level 1 (STS-1) The basic logical building block signal of synchronous optical networks (SONET). The STS-1 signal has a bit rate of 51.840 Mb/s. [T1.X1] [After T1.
Syndication An option that allows you to extend your reach by distributing ads to additional partner sites.
synonym dictionary A dictionary that enables users to search for synonyms of their query terms when they search a collection.
Synonym expansion When a query or document is expanded with a defined list of synonyms for the words it originally contains.
Syntactic analysis Used to analyze query through entity/phrase extraction, anti-phrasing, and to remove word-sense ambiguity (the color orange versus the fruit, for example).
syntactic sugar An alternative way of writing something more easily; a shortcut.
Syntactical patterns Used for detecting information entities such as people, places, product codes, and prices.
syntax From Greek, "with-arrangement". How things (particularly symbols) are put together with each other.
syntax error An error detected by the compiler during its parsing of a program. Syntax errors usually result from mis-ordering symbols within expressions and…
syntax tree An internal representation of your program wherein lower-level constructs dangle off the higher-level constructs enclosing them.
Synthesis The automatic generation of a run able system from a specialized design where each module description has associated implementations.
Synthetic Aperture Radar (SAR) A radar technique that processes echoes of signals emitted at different points along a satellite's orbit.
syntonization The process of setting the frequency of one oscillator equal to that of another.
SYS System
Sys C/O System Check Out.
Sys Cmn System Common.
Sys T&E System Test and Evaluation. 284
syscall A "function" call directly to the "operating system". Many of the important subroutines and functions you use aren't direct system calls, but are built up…
SYSCOM Systems Command.
SYSGEN Acronym for system generation.
SYSKEY A tool used to configure the startup key, a random, 128-bit, symmetric cryptographic key created at system startup and used to encrypt all of the user`s…
SYSOP System administrator
System Physically connected generation, transmission, and distribution facilities operated as an integrated unit under one central management, or operating…
System Activation That set of coordination, assessment, decision, direction and control functions implemented to enable defense weapons, and to initiate the automated…
system administration In computer technology, a set of functions that provides support services, ensures reliable operations, promotes efficient use of the system, and ensures…
system administrator The person responsible for configuring and administering the enterprise's computers, networks, and software systems.
system analysis A systematic investigation of a real or planned system to determine the functions of the system and how they relate to each other and to any other system.
System Architecture The structure and relationship among the components of a system. The system architecture may also include the systems interface with its operational…
System Architecture System Capability Specification (SCS) The structure and relationship among the components of a system. The system architecture may also include the systems interface with its operational…
system attendant One of the core Exchange 2000 services that performs miscellaneous functions (usually related to directory information) such as generation of address…
system blocking Synonym access denial.
system blocking signal A control message generated within a telecommunications system to indicate temporary unavailability of system resources required to complete a requested…
system board A printed circuit board that contains the CPU, expansion bus slots, and system memory. Also known as a "motherboard."
system budget See power budget.
System Center (SC) A center in CMAFB responsible for the scheduling of maintenance for worldwide sensors and supporting equipment as well as maintenance responsibility of…
System Concept Paper (SCP) OBSOLETE. For a major program, was used to summarize the results of the concept exploration phase up to Milestone I and to describe the acquisition…
System Configuration Control Board (SCCB) The senior SDS configuration control board. The SCCB will manage the systemlevel configuration of the SDS and the interfaces between elements of the SDS.
System Control Function or task of monitoring the maintenance status of assigned sensors and computer systems.
system definition The identification of the boundaries of a system to establish a firm basis for any interconnection with other systems [CESG].
System Definition Review (SDR) The formal review, in briefing format, for periodically deciding on updates to the system plans for development based on estimates of the program…
System Deployment Delivery of the completed production system to the using activity. 285
System Design (1) The process of defining the hardware and software architectures, components, modules, interfaces, and data for a system to satisfy specified system…
System Design Concept An idea expressed in terms of general performance, capabilities, and characteristics of hardware and software oriented either to operate or to be operated…
System Design Review (SDR) Evaluates the optimization, correlation, completeness, and risks associated with the allocated technical requirements.
System Development Life Cycle (SDLC) The scope of activities associated with a system, encompassing the systems initiation, development and acquisition, implementation, operation and…
system documentation The collection of documents that describes the requirements, capabilities, limitations, design, operation, and maintenance of a system, such as a…
System Effectiveness The measure of the extent to which a system may be expected to achieve a set of specific mission requirements.
system electronic information security policy (SEISP) A detailed statement of the technical aspects of a System Security Policy [CESG].
System Evolution Plan (SEP) The documented plan that establishes the strategy to evolve the BMDS capabilities over time.
system failure transfer In the event of a catastrophic failure, the ability to transfer central office trunks or interoffice trunking to predetermined stations to allow incoming…
System Families A collection or grouping of interrelated software systems in the domain that share a set of common characteristics.
system follow-up The study of the effects of a system after it has reached a stabilized state of operational use.
System Generated Electromagnetic Pulse (SGEMP) Transient electromagnetic radiation caused by the photoelectron emission of the surface of an object subjected to a pulse of photon energy.
system generation (SYSGEN) The process of selecting optional parts of an operating system and of creating a particular operating system tailored to the requirements of a data…
system health agent A client software component that declares a client's health state (by providing a statement of health) to a NAP agent.
system health validator A server software counterpart to a system health agent (SHA). A system health validator verifies the statement of health (SoH) made by its respective SHA.
system high mode 1. [An] information system (IS) security mode of operation wherein each user, with direct or indirect access to the information system (IS), its…
system indicator [A] symbol or group of symbols in an off-line encrypted message identifying the specific cryptosystem or key used in the encryption. [INFOSEC-99]
system integration The progressive linking and testing of system components to merge their functional and technical characteristics into a comprehensive, interoperable…
System Integration Test A live flight system-level test utilizing actual system command and control, sensors, and weapon hardware.