Current An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by

Current An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasm,

voltage Voltage, electrical potential difference, electric tension or electric pressure (denoted ∆ V) and measured in units of electric potential: volts, or joules per coulomb is the electric potential difference between two points, or the difference in electric potential energy of a unit chargetransported between two points,

resistor A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. Resistors act to reduce current flow, and, at the same time, act to lower voltage levels within circuits,

inductor An inductor, also called a coil or reactor, is a passive two-terminal electrical component which resists changes in electric current passing through it,

supply A power supply is a device that supplies electric power to an electrical load, conductor Electrical conductor, a material allowing the flow of electric current,

insulatorA true insulator is a material that does not respond to an electric field and completely resists the flow of electric charge,

electrical appliance,

direct current Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, thermocouples, solar cells,

alternating current In alternating current (AC, also ac), the flow of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge is only in one direction, generator Electric generator, a device that converts mechanical energy to electrical energy

power station A power station (also referred to as a generating station, power plant, powerhouse or generating plant) is an industrial facility for thegeneration of electric power,

transformer A transformer is an electrical device that transfers energy between two circuits through electromagnetic induction,

power line Power-line communication (PLC) carries data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers, transmission line In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to carry alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account, transmission line, circuit Electrical circuit, an electrical network that has a closed loop giving a return path for the current,

InternetThe Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve several billion users worldwide,

modem A modem (mo dulator- dem odulator) is a device that modulates an analog carrier signal to encode digital information and demodulates the signal to decode the transmitted information,

broadband connection It is a connection that uses multiple data channels to increase bandwidth, which is the amount of data that can be transferred in a given time period.,

ADSL Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide,

satellite A communications satellite or comsat is an artificial satellite sent to space for the purpose of telecommunications,

internet telephone

Voice over Internet Protocol (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet,

network A computer network or data network is a telecommunications network that allows computers to exchange data,

Transmission Control Protocol The Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite (IP), and is so common that the entire suite is often called TCP/IP.,

User Datagram Protocol The User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite (the set of network protocols used for the Internet)., Internet Protocol The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries,

Local area networks A local area network (LAN) is a computer network that user interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media.

Wireless local area network A wireless local area network (WLAN) links two or more devices using some wireless distribution method (typically spread-spectrum or OFDMradio), and usually providing a connection through an access point to the wider Internet.,

Bridge A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle, router A router is a device that forwards data packets between computer networks, creating an overlay internetwork, gateway Gateway (telecommunications), a network node equipped for interfacing with another network that uses different communication protocols

backboneThe Internet backbone refers to the principal data routes between large, strategically interconnected networks and core routers on the Internet,

serverA server is a system (software and suitable computer hardware) that responds to requests across a computer network to provide, or help to provide, anetwork service, clientA client is a piece of computer hardware or software that accesses a service made available by a server.,

hub Ethernet hub, a computer networking hardware device,

Half-duplex A duplex communication system is a point-to-point system composed of two connected parties or devices that can communicate with one another in both directions, simultaneously,

Full-duplex,

transmission mode Continuous transmission mode is a telecommunications mode where a good part of the communication transmission links are of the continuous-mode type, in which the signal is present at all times., Voice over IP,

Integrated Services Digital Network Integrated Services for Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network,

Wireless connections A wireless network is any type of computer network that uses wireless data connections for connecting network nodes.:

cellular and satellite Cell Phones and Satellite offers quality cell phone accessories and phone covers, iPod covers and accessories, iTouch covers and accessories, and prepaid / replacement phones. We also carry DIRECTV Satellite TV,

Digital Subscriber Line Digital subscriber line (DSL, originally digital subscriber loop) is a family of technologies that provide Internet access by transmitting digital data over the wires of a local telephone network.,

Data channel The Display Data Channel, or DDC, is a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.,

bearer channel A bearer channel is a DS-0 that carries call content i.e. one that does not carry signaling.,

Logic gate A logic gate is an idealized or physical device implementing a Boolean function, that is, it performs a logical operation on one or more logical inputs, and produces a single logical output.,

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