Equipment network allowing the data-processing interconnection of equipment in local area network by optimizing the Band-width
Contrary to the hub which is only one equipment network of level 1 (physical layer) of OSI model, the switch intervenes on level 2 (data link layer) of OSI model.
This fundamental difference makes it possible the switch to transmit the traffic network only between the ports implied in the communication.
For that, the switch embarks powerful algorithms of training enabling him to maintain and enrich a table by the equipment connected (via their MAC addresses) on each one of its ports. Consequently, when equipment connected on port 4 of a switch sends a screen bound for equipment connected on the port 14 of this same switch, only these 2 ports are inter-connected, all the other ports being preserved of this traffic network.
But the arrival of the switches especially allowed the decoupling of the physical and logical structures of the networks (hitherto realized by expensive departmental routers), by integrating nativement the concept of virtual networks (VLAN). This possibility of dynamic redefinition of the logic design of a network thus makes it possible to adapt simply and quickly the segmentation of the traffic to the evolutions of the network.
PDA-Personal Digital Assistant Electronic message minder or personal numerical assistant, made popular by the firm Palm (MT).
Firmware Software allowing the operation of a data-processing component, it is stored on the memory of this one.
Samsung Electronics Samsung Electronics is a world leader in the field of the semiconductors, telecommunications and technologies of numerical convergence.
Ripper Action to recover on hard Disk of the data coming from Multi-media contents such as CD or the DVD.
IRQ A request of interruption is a signal sent by a peripheral of the computer (keyboard, mouse, chart network...) to draw the attention of the system. When that an event of this type occurs, the system stops temporarily what it is making to answer this reque
PABX One also finds: PBX and PAX. PBX is especially used with É-U (PABX in France). Private Branch eXchange. self-switching private, used in the companies, ensuring the internal communications and the bond with the total commutated telephone network. An autom
Inch Anglo-Saxon measuring unit 1 inch = 2,54 cm often used in data processing and the products high tech to measure the diagonal of a screen.
PCMCIA Founded in 1989, this consortium of more than 300 companies of the data-processing sector encourages the development of standards making it possible to extend the capacities of reception of peripherals of the portable computers.
Data-processing peripheral Equipment distinct from the basic central processing unit coming to supplement it to increase the capacities or the functions by them.
Partition The partition is a space on the hard Disk allocated with the information storage.
Nokia Nokia is a world leader of the mobile communications.
NDAS Technology owner of storage by hard Disk network conceived, developed and marketed by Ximeta.
Netgear Data-processing manufacturer specialized in the accessories networks (Charts networks, routers, equipment of network without wire...)
Motorola Motorola is a world leader in the field of technologies of telecommunications without wire, car and high flow.
Microsoft Surfaces Information processing system invented by Microsoft made up of a table whose top is a screen with which users can interact with the hand, without mouse nor keyboard.
Microcontrolor Information processing system invented by Microsoft made up of a table whose top is a screen with which users can interact with the hand, without mouse nor keyboard.
Microprocessor The micro processor is the heart of a microcomputer.
RAM Read-write memory of a computer.
Video memory Read-write memory with double entry
Memory hiding place Buffer memory with very fast access, located between the microprocessor and the read-write memory (RAM)
ROMANIAN Read-only memory of a computer
Macro-Computer Large-scale computer which can have a bulk memory as well as many storage units in order to treat many operations simultaneously.
Kit hand-free Bluetooth Accessory for portable telephones, allowing to telephone while leaving the hands on the wheel and the mobile in the pocket.
IPBX The IPBX ensures the commutation of the calls and their authorizations.
Hub Material equipment allowing the interconnection network of several machines.
HDMI New video audio connector replacing the catch péritel.
Green PC Label indicating that the components of a PC respect the standard of energy saving instituted by the EPA.
Gateway VoiP Gateway is equipment, computer which makes it possible to make forward telephone calls through several type of networks such as the traditional network of telephony (network STN) and Internet network
FSB Basic frequency of basket of a computer. Main frequency of the computer.
Flashdisk Nonvolatile mass memory being able to replace a hard Disk advantageously for example.
Firewire Firewire is a Port high flow available on the computers PC and MAC. It is also known under the name of bus IEEE 1394, the Firewire term having with the departure popularized by APPLE.
EEPROM Permanent electronic memory (in opposition to volatile memories of type RAM) being able to be rewritten by application of an electric tension higher than the tension of use.
Transflectif screen Hybrid screen using at the same time the properties of a transmissif and reflective screen
Touch screen Monitor on which is added a tactile flagstone. The latter is an additional aiming system functioning thanks to the pressure of a finger or a stylet.
Screen Plasma A screen plasma is a flat-faced screen whose lighting of the pixels is carried out by the electric exitation of a gas (Argon/Xenon)...
Screen NED New technology of flat-faced screens using the nanotubes.
LCD Acronym for the English expression "Liquid Crystal Display", resulting in "liquid crystal display"
NAS The guiding principle is simple: unit NAS is connected to the network Ethernet and thanks to embarked electronics and an microphone-Os, the discs which it contains are directly accessible since the network.
Hard disk The hard disk is the physical space of data storage on a computer.
DMA Canal+ of direct access to the memory of a computer
To start the operating system of a computer "To boot", it is to start, launch, start, or to initialize the Operating system of the computer.
CTI Together techniques allowing the implementation of applications resting on a telephone interfunctioning of applicatifs data-processing and applicatifs.
Core 2 Duet Microprocessor INTEL successor of Pentium 4.
CF Compact flash indicates a type of memory boards making it possible to record data.
Cluster It is a regrouping of two waiters or more, in order to create a "super virtual waiter".
Key USB A key USB is a storage unit of small size being connected on port USB of a computer.
Motherboard A mother chart is the base of any micro-computer, it is it which ensures the communication between the various elements of the system.
Sensor CCC Photo sensor using a charge-transfer device (CCC = Charge Couples Device)
USB Protocol of transfer of data between a computer and its peripherals.
Bundle Mean package literally. A bundle often indicates a batch of articles intended for the sale within the framework of an offer.
Travelling ball Peripheral intended to accurately represent displacements in the two axes of a mobile ball on itself, recorded thanks to a mechanical or luminous device, by displacements homologous with one cursor to the screen.
BIOS This software gives the first instructions to the starting of a computer.
Bar of memory Small expander card for computer which contains read-write memory.
Backup The backup consists in making a safeguard of the data.
CPU The principal case of a micro-computer.
Switch