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Network hardware

Terms related to network hardware, including definitions about cables or file servers and words and phrases about routers and switches.

ONE - WIR

  • one-armed router - A one-armed router is a router that routes traffic between virtual local area networks (VLANs).
  • one-banana problem - A one-banana problem is an easily resolved issue.
  • optical network (photonic network) - An optical (photonic) network transmits information as optical rather than electronic signals: It uses light, not electrical currents, to convey data.
  • optical wireless - Optical wireless refers to the conbined use of two technologies - conventional radio-frequency (RF) wireless and optical fiber - for telecommunication.
  • passive optical network (PON) - A passive optical network (PON) is a system that brings optical fiber cabling and signals all or most of the way to the end user.
  • patch antenna - A patch antenna is a wafer-like directional antenna suitable for covering single-floor small offices, small stores and other indoor locations where access points cannot be placed centrally.
  • patch cord - A patch cord is a length of cable, with connectors on the ends, that is used to connect an end device to something else, such as a power source.
  • Peltier effect - The Peltier effect is a temperature difference created by applying a voltage between two electrodes connected to a sample of semiconductor material.
  • permanent virtual circuit (PVC) - A permanent virtual circuit (PVC) is a software-defined logical connection in a network such as a frame relay network.
  • personal area network (PAN) - A personal area network (PAN) is the interconnection of information technology devices within the range of an individual person, typically within a range of 10 meters.
  • phase-change cooling (vapor cooling) - Phase-change cooling, also called vapor cooling, is a microprocessor-cooling technology that works according to the same principles as a conventional refrigerator, freezer or air conditioner.
  • phlashing - Phlashing is a permanent denial of service (PDoS) attack that exploits a vulnerability in network-based firmware updates.
  • physical unit (PU) - In IBM's Systems Network Architecture (SNA), a physical unit (PU) identifies a network node that supports communication sessions between logical units (LU).
  • port interface card (PIC) - A port interface card (PIC) is a computer circuit board that provides multiple, diverse interfaces for connections to external networks.
  • Power over Ethernet (PoE) - Power over Ethernet (PoE) is a technology for wired Ethernet local area networks (LANs) that allows the electrical current necessary for the operation of each device to be carried by the data cables rather than by power cords.
  • Preboot Execution Environment (PXE) - The Preboot Execution Environment (PXE) is an industry standard client/server interface that allows networked computers that are not yet loaded with an operating system to be configured and booted remotely by an administrator.
  • presence technology - Presence technology is a type of application that makes it possible to locate and identify a computing device wherever it might be, as soon as the user connects to the network.
  • private cloud (internal cloud or corporate cloud) - Private cloud is a type of cloud computing that delivers similar advantages to public cloud, including scalability and self-service, but through a proprietary architecture.
  • Quad FastEthernet (QFE) - Quad FastEthernet (QFE) is a network interface card (NIC) manufactured by Sun Microsystems that is designed to enhance the bandwidth of a Peripheral Component Interconnect (PCI)-based server using Sun Microsystem's Solaris 8 or later operating environment.
  • RAIN (redundant/reliable array of inexpensive/independent nodes) - RAIN (also called channel bonding, redundant array of independent nodes, reliable array of independent nodes, or random array of independent nodes) is a cluster of nodes connected in a network topology with multiple interfaces and redundant storage, providing fault tolerance and graceful degradation.
  • RCA connector - An RCA connector is a plug and a jack designed for use with coaxial cable for frequencies ranging from the very lowest up to several megahertz.
  • Reduce, reuse, recycle (R3) - Reduce, reuse and recycle (R3) are the three essential components of environmentally-responsible consumer behavior.
  • redundancy - Redundancy is a system design in which a component is duplicated so if it fails there will be a backup.
  • Reliability, Availability and Serviceability (RAS) - Reliability, Availability and Serviceability (RAS) is a set of related attributes that must be considered when designing, manufacturing, purchasing or using a computer product or component.
  • Remote Direct Memory Access (RDMA) - Remote Direct Memory Access (RDMA) is a technology that allows computers in a network to exchange data in main memory without involving the processor, cache or OS.
  • remote wakeup (RWU) - Remote wakeup (RWU) is a general term for the powering-up of (turning on) a computer over a network.
  • Resilient Packet Ring (RPR) - Resilient Packet Ring (RPR) is a network topology being developed as a new standard for fiber optic rings.
  • rich client - A rich client is a networked computer that has some resources installed locally but also depends on other resources distributed over the network.
  • ring - A ring is a network topology or circuit arrangement in which each device is attached along the same signal path to two other devices, forming a path in the shape of a ring.
  • ring network - A ring network is a local area network (LAN) in which the nodes (workstations or other devices) are connected in a closed loop configuration.
  • ROADM (reconfigurable optical add-drop multiplexer) - An ROADM (reconfigurable optical add-drop multiplexer) is a device that can add, block, pass or redirect modulated infrared (IR) and visible light beams of various wavelengths in a fiber optic network.
  • router - A router is a physical or virtual appliance that passes information between two or more packet-switched computer networks.
  • RS-232C - RS-232C is a long-established standard ("C" is the current version) that describes the physical interface and protocol for relatively low-speed serial data communication between computers and related devices.
  • running disparity (RD) - Running disparity (RD or rd) is the difference between the number of logic 1 bits and logic 0 bits between the start of a data sequence and a particular instant in time during its transmission.
  • SDLC (Synchronous Data Link Control) - (SDLC is also an abbreviation for systems development life cycle.
  • Seebeck effect - The Seebeck effect describes the generation of electricity following the connection of two dissimilar electrical conductors or semiconductors that illustrates the thermoelectric effect.
  • segment - A segment is a defined portion or section of something larger such as a database, geometric object, or network.
  • serial port server (serial server or port redirector) - A serial port server, also called a serial server or port redirector, is a device that transfers data between a computer serial port (COM port) and an Ethernet local area network (LAN).
  • server - A server is a computer program or device that provides a service to another computer program and its user, also known as the client.
  • server accelerator card (SSL card) - A server accelerator card (also known as an SSL card) is a Peripheral Component Interconnect (PCI) card used to generate encryption keys for secure transactions on e-commerce Web sites.
  • server blade - A server blade is a thin, modular electronic circuit board containing one, two, or more microprocessors and memory, that is intended for a single, dedicated application (such as serving Web pages) and that can be easily inserted into a blade server, which is a space-saving rack with many similar servers.
  • server consolidation - Server consolidation is an approach to the efficient usage of computer server resources in order to reduce the total number of servers or server locations that an organization requires.
  • server farm (Web farm, Web server farm) - A server farm is a group of computers acting as servers and housed together in a single location.
  • server refresh cycle - The server refresh cycle is the length of time that normally passes between installations of new servers and related hardware in a data center.
  • server sprawl - Server sprawl is a situation in which multiple, under-utilized servers take up more space and consume more resources than can be justified by their workload.
  • session border controller (SBC) - A session border controller (SBC) is a dedicated hardware device or software application that governs the manner in which phone calls are initiated, conducted and terminated on a Voice over Internet Protocol (VoIP) network.
  • SIMO (single input, multiple output) - SIMO (single input, multiple output) is an antenna technology for wireless communications in which multiple antennas are used at the destination (receiver).
  • small form factor (SFF) - Small form factor (SFF) refers to any of several physically compact connector designs that have been developed for use in fiber optic systems.
  • small form-factor pluggable (SFP) - Small form-factor pluggable (SFP) is a specification for a new generation of optical modular transceivers.
  • smart grid sensor - A smart grid sensor is a small, lightweight node that serves as a detection station in a sensor network.
  • smart home or building (home automation or domotics) - A smart home is a residence that uses internet-connected devices to enable the remote monitoring and management of appliances and systems, such as lighting and heating.
  • smart meter - A smart meter is an Internet-capable device that measures energy, water or natural gas consumption of a building or home.
  • softcooling (software cooling) - Softcooling is a software-based method of computer component cooling, conducted either by adjusting component settings or by using softcooling products.
  • spectrum analyzer - A spectrum analyzer is a device that displays signal amplitude (strength) as it varies by signal frequency.
  • Squid proxy server - Squid is a Unix-based proxy server that caches Internet content closer to a requestor than its original point of origin.
  • stackable hub - A stackable hub is a hub designed to be connected and stacked or positioned on top of another hub, forming an expanding stack.
  • star network - A star network is a local area network (LAN) in which all nodes (workstations or other devices) are directly connected to a common central computer.
  • storage distance extension - Storage distance extension refers to any of several different technologies that allow data communication in Fibre Channel storage area networks (SANs) over long spans of fiber optic cable.
  • storage security - Storage security is the group of parameters and settings that make storage resources available to authorized users and trusted networks - and unavailable to other entities.
  • storage snapshot - A storage snapshot is a set of reference markers for data at a particular point in time.
  • switch-on-a-chip (SOC) - A switch-on-a-chip (SOC) is a network - typically a storage network - switch (a device that channels incoming data flow from any of multiple input ports to the output port appropriate for its destination) that is built into a single microchip (integrated circuit).
  • switching fabric - Switching fabric is the combination of hardware and software that moves data coming in to a network node out by the correct port (door) to the next node in the network.
  • systems engineering (SE) - Systems engineering (SE) is an interdisciplinary area of technology that encompasses software and hardware systems design and development with consideration to their interconnections and the environment in which they operate.
  • T interface - In Integrated Services Digital Network (ISDN) service, a T interface is the electrical interface between a network terminating unit 1 (NT1) and a network terminating unit 2 (NT2) device, which typically is a private branch exchange (PBE).
  • T-carrier system - To see the relationship between T-carrier, E-carrier, and DS0 multiples, see digital signal X.
  • T1 (T-1) - Also see the T-carrier system, of which the T1 is a part.
  • TCP/IP offload engine (TOE) - The TCP/IP offload engine (TOE for short) is a technology that is gaining popularity in high-speed Ethernet systems for the purpose of optimizing throughput.
  • Tempest - Tempest was the name of a classified (secret) U.
  • terminal server - A terminal server, also sometimes called a communication server, is a hardware device or server that provides terminals, such as PCs, printers, and other devices, with a common connection point to a local or wide area network (WAN).
  • Terminal Server product or Microsoft Windows Terminal Server (WTS) - The Microsoft Windows Terminal Server (WTS) is a server program running on its Windows NT 4.
  • thermoelectric cooling - Thermoelectric cooling is a way to remove thermal energy from a medium, device or component by applying a voltage of constant polarity to a junction between dissimilar electrical conductors or semiconductors.
  • thick client (fat client) - A thick client (sometimes called a fat client) is a form of client-server architecture.
  • Thinnet - Thicknet and Thinnet (sometimes called ThickWire and ThinWire) are commonly used terms for the larger and smaller size of coaxial cable used in Ethernet local area networks.
  • tiered storage - Tiered storage is a way to assign different categories of data to various types of storage media with the objective of reducing the total cost of storage.
  • tree network - In telecommunication networks, a tree network is a combination of two or more star networks connected together.
  • twinaxial cable - Twinaxial cable is coaxial cable that contains two inner conducting wires rather than one.
  • twisted pair - Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company.
  • two-way server - A two-way server is a server that incorporates a multi-core processor for increased performance.
  • unified computing system (UCS) - A unified computing system (UCS) is is a converged data center architecture that integrates computing, networking and storage resources to increase efficiency and enable centralized management.
  • United Kingdom Climate Change Act - The United Kingdom Climate Change Act is the world's first legally binding environmental sustainability framework.
  • Unshielded Twisted Pair (UTP) - Unshielded twisted pair (UTP) is a ubiquitous type of copper cabling used in telephone wiring and local area networks (LANs).
  • V.xx - The V Series Recommendations from the ITU-TS are summarized in the table below.
  • virtual area network (VAN) - A virtual area network (VAN) is a network on which users are enabled to share a more visual sense of community through high band-width connections.
  • virtual private LAN service (VPLS) - Virtual private LAN service (VPLS) is a technology that makes it possible to connect geographically dispersed local area networks (LANs) logically over the Internet.
  • VoIP trunk gateway - A VoIP trunk gateway is an interface that facilitates the use of plain old telephone service (POTS) equipment, such as conventional phone sets and fax machines, with a voice over IP (VoIP) network.
  • WAN accelerator - A WAN accelerator is an appliance that improves the end user's experience on a wide area network (WAN).
  • WAN interface card (WIC) - A WAN interface card, or WIC, is a specialized network interface card (NIC) that allows devices to connect to a wide area network.
  • WAN optimization (WAN acceleration) - WAN optimization -- also known as WAN acceleration -- is the category of technologies and techniques used to maximize the efficiency of data's flow across a wide area network (WAN), between organizations' centralized data centers and their remote locations.
  • What is a SAN? Ultimate storage area network guide - A storage area network (SAN) is a dedicated high-speed network or subnetwork that interconnects and presents shared pools of storage devices to multiple servers.
  • white box switch - A white box switch is built on a low-cost, bare metal device that runs on merchant silicon.
  • white space device (WSD) - A white space device is an FCC-certified wireless device that can be used without an exclusive broadcast license in the RF spectrum below 700 MHz: underutilized, unlicensed portions of the spectrum called white space.
  • Wi-Fi (802.11x standard) - Wi-Fi is the popular term for high-frequency wireless local area network (WLAN) technology and a standard that has gained acceptance in many companies as an alternative to a wired LAN.
  • Wide Area Application Services (WAAS) - Wide Area Application Services (WAAS) is a Cisco Systems technology that improves the performance of applications on a wide area network (WAN).
  • wide-area file services (WAFS) - Wide-area file services (WAFS) is a storage technology that makes it possible to access a remote data center as though it were local.
  • WiMAX (Worldwide Interoperability for Microwave Access) - WiMAX is a wireless industry coalition whose members organized to advance IEEE 802.

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