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63 Cards in this Set
- Front
- Back
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Various networks that are linked together to make information flow freely throughtout different parts of the organization and between the organization and its external environment.
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enterprise networking
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The linking of separate networks, each of which retains its own identity, into an interconnected network
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internetworking
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Technology that breaks messages into small, fixed bundles of data and routes them in the most economical way through any available communications channel.
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packet swiching
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Specialized communications processor that forwards data packets form one network to another network.
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router
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A set of rules and procedures that govern transmission between the components in a network
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protocol
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The ability of comuters and computer-based devices to communicate with each other and share information in a meanignful way without human intervention.
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connectivity
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Dominant model for achieving connectivity among different networs. Provides a universally agreed-on method for breaking up digital messages into packets, routing them to the proper address, and then reassembling them into coherent messages.
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Transmission Control Protocol/Internet Protocol (TCP/IP)
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Less widely used network connectivity model developed by the International Standards Organization for linking different types of computers and networks.
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Open Systems Interconnect (OSI)
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The link by which data or voice are transmitted between sending and receiving devices in a network
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channel
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A transmission medium consisting of pairs of twisted copper wires; used to transmit analog phone conversations but can be used for data transmission
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twisted wire
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A continuous waveform that passes thriough a communications medium; used for voice communications
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analog signal
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A descrete wave form that transmits data coded into two discrete states as 1-bits and 0-bits, which are represented as on-off electrical pulses; used for data communications.
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digital signal
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A device for translating a computer's digital signals into analog form for tranmission over ordinary telephone lines, or for translating analog signals back into digital form for reception by a computer.
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modem
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A tranmission medium consisting of thickly insulated copper wire; can transmit large volumes of data quickly.
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coaxial cable
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A fast, light, and durabel transmission medium consisting of thin strands of clear glass fiber bound into cables. Data are transmitted as light pulses.
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fiber-optic cable
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Part of a network handling the major trafic and providing the primary path for trafic flowing to aor form other networks.
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backbone
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High-speed networking technologies for transmitting data in the form of light pulses.
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optical network
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Technology for boosting transmission capacity of optical fiber by using many different wavelengths to carry separate streams of data over the sme fiberstrand at the same time.
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dense wavelength division multiplexing (DWDM)
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Ability of a single communication channel to carry data transmissions from multiple sources simultaneously.
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multiplexing
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A high-volume, long distance, point-to-point transmission in which high frequency radio signals are transmitted through the atmosphere form one transmission station to another.
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microwave
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The transmission of data using orbiting satellites that serve as relay stations for transmitting microwave signals over very long distances.
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satelite
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A wireless transmission technology in which the pager beeps when the user receives a message, used to transmit short alphamumeric messages
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paging system
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a device that transmits voice or data using radio waves to communicate with radio antennas placed within adjacent geographic areas called cells.
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cellular telephone (Cell Phone)
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a wireless cellular tchnology that uses lower-power, higher-frequency radio waves than does cellular technology.
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personal communication services (PCS)
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Small, pen-based, handheld computers with built-in wireless telecommunications capable of entirely digital communication transmission.
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personal digital assistants (PDA)
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Wireless phone with voice, text, and Internet capabilities.
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smart phone
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Wireless networks that enable two-way transmission of data files cheaply and efficiently
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mobile data networks
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A change in signal from positive to negative or vice versa that is used as a measure of transmission speed.
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baud
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The capacity of a communications channel as measured by the difference between the highest and lowert frquencies that can be transmitted fy the channel.
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bandwidth
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A telecommunications network that requires its own dedicated channels and that encopasses a limited distance, usually one building or serveral buildings in close proximity.
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local area network (LAN)
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Special software that routes and manages communications on the network and coordinatd network resources.
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network operating system (NOS)
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Network architecture that gives equal power to all computers on the network; used primarily in small networks
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peer-to-peer
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The way in which the components of a network are connected.
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topology
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A network topology in which all computers and other devices are connected to a central hub. All communications between network devices must pass through the hub.
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star network
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Network topology linking a number of computers by a single circuit with all messages bradcast to the entire network.
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bus network
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a network topology in which all computers are linkd by a closed loop in a manner that passes data in one direction form one computer to another.
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ring network
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Stands for Wireless Fidelity and refers to the 802.11 family of wireless networking standards.
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Wi-Fi
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Standard for high-speed, wireless LANs that can transmit up to 11 Mbps within a 30-50-meter area, providing a low-cost flexible technology for connecting workgroups and providing mobile Internet access.
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802.11b
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Box consisting of a radio receiver/transmitter and antennae that link to a wired network, router, or hub.
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access point
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Add-in card (network interface card) that has a built-in radio and antenna.
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wireless NIC
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A specific geographic location in which an access point provides public Wi-Fi network service.
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hot spot
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Standard for wireless personal area networks that can transmit up to 722 Kbps within a 10-meter area.
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bluetooth
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Telecommunications network tht spans a large geographical distance. May consist of a variety of cable, satelite, and microwave technologies.
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wide aea network (WAN)
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Telephone lines that a person can access from a terminal to transmit data to another computer, the call being routed or switched throough paths to the designated destination
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switched lines
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Telephone lines that are continuously available for transmission by a lessee. Typically conditionaed to transmit data at high speeds for high-volume applications.
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dedicated lines
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Network that spams a metropolitan area, usually a city and its major suburbs. Its geographic scope falls between a WAN and a LAN
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metropolitan area network (MAN)
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Private,multipath, data-only, third-party-managed network that multiple organizations use on a subscription basis.
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value-added network(VAN)
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A shared network service technology that packages data into bundles for transmission but does not use extensive error-correction routines. Cheaper and fasted than packet switching.
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frame relay
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A networking technology that parcels information into 53-byte cells, allowing dat to be tranmitted between comuters form different vendors at high speeds.
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asynchronous transfer mode (ATM)
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International standard for transitting voice, data,image,a nd video to sulpport a wide range of services over the public telephone lines.
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Integrated Services Digital Network (ISDN)
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A group of technologies providing high-capacity transmission over existing copper telephone lines.
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digital subscriber line (DSL)
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Modem designed to operate over cable TV lines to provide high-speed asscess to the Web or corporate intranets.
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cable modem
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A dedicated telephone connection comprising 24 channels that can support a dat tranmision rate of 1,544 Mbps. Each channel can be configured to carry voice or data simultaneously.
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T1 line
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High-speed transmission technology. Also designated a single communications medium that can transmit multiple channels of data simultaneously
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broadband
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Network with technology to enabel voice, video, and data to run over a single network.
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converged network
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A system for digitizing a spoken message and transmitting it over a network
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voice mail
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A machine that digitizes and transmits documents with both text and graphics over telephone lines.
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facsimile (fax)
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The ability to confer with a group of people simultaneously using the telephone or e-mail group communication software.
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teleconferencing
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Telconferencing in which two or more users are able to edit and modify data files simultaneously
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dataconferencing
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Teleconferencing in which participants see each other over video screens.
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videoconferencing
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Education or training delivered over a distance to individuals in one or more locations.
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distance learning
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Instruction delivered through purely digital technology, such as CD-ROMs, the Internet, or private networks.
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e-learning
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The direct computer-to-computer exchange between tow organizations of standard business transaction documents.
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electronic data interchange (EDI)
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