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The Joint Communications Unit (JCU) is a unit of the Joint Special Operations Command charged to standardize and ensure interoperability of the communication procedures and equipment of JSOC and its subordinate units. JCU was activated at Ft. Bragg (now Fort Liberty), NC in 1980, after the failure of Operation Eagle Claw.
Automatic repeat request (ARQ), also known as automatic repeat query, is an error-control method for data transmission that uses acknowledgements (messages sent by the receiver indicating that it has correctly received a message) and timeouts (specified periods of time allowed to elapse before an acknowledgment is to be received) to achieve ...
Retransmission, essentially identical with automatic repeat request (ARQ), is the resending of packets which have been either damaged or lost. Retransmission is one of the basic mechanisms used by protocols operating over a packet switched computer network to provide reliable communication (such as that provided by a reliable byte stream, for example TCP).
The Joint Communications Support Element (Airborne) (JCSE) is a United States Department of Defense (DoD) standing joint force headquarters expeditionary communications provider that can provide rapid deployable, en route, early entry, and scalable command, control, communications, and computer (C4) support to the unified combatant commands, special operations commands, and other agencies as ...
NSS—Network Security Services; NSS—Name Service Switch; NT—New Technology; NTFS—NT Filesystem; NTLM—NT Lan Manager; NTP—Network Time Protocol; NUMA—Non-Uniform Memory Access; NURBS—Non-Uniform Rational B-Spline; NVR—Network Video Recorder; NVRAM—Non-Volatile Random-Access Memory
Computer network engineering is a technology discipline within engineering that deals with the design, implementation, and management of computer networks. These systems contain both physical components, such as routers , switches, cables, and some logical elements, such as protocols and network services .
A personal area network (PAN) is a computer network used for communication among computers and different information technological devices close to one person. Some examples of devices that are used in a PAN are personal computers, printers, fax machines, telephones, PDAs, scanners, and video game consoles.
X.21, also referred to as X21, is an interface specification for differential communications introduced in the mid-1970s by the CCITT, now ITU-T. X.21 was the first digital signaling interface developed. [2] The connector specification is defined by the ISO document 4903. [3]