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63 Cards in this Set

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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.
enterprise networking
The linking of separate networks, each of which retains its own identity, into an interconnected network
internetworking
Technology that breaks messages into small, fixed bundles of data and routes them in the most economical way through any available communications channel.
packet swiching
Specialized communications processor that forwards data packets form one network to another network.
router
A set of rules and procedures that govern transmission between the components in a network
protocol
The ability of comuters and computer-based devices to communicate with each other and share information in a meanignful way without human intervention.
connectivity
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.
Transmission Control Protocol/Internet Protocol (TCP/IP)
Less widely used network connectivity model developed by the International Standards Organization for linking different types of computers and networks.
Open Systems Interconnect (OSI)
The link by which data or voice are transmitted between sending and receiving devices in a network
channel
A transmission medium consisting of pairs of twisted copper wires; used to transmit analog phone conversations but can be used for data transmission
twisted wire
A continuous waveform that passes thriough a communications medium; used for voice communications
analog signal
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.
digital signal
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.
modem
A tranmission medium consisting of thickly insulated copper wire; can transmit large volumes of data quickly.
coaxial cable
A fast, light, and durabel transmission medium consisting of thin strands of clear glass fiber bound into cables. Data are transmitted as light pulses.
fiber-optic cable
Part of a network handling the major trafic and providing the primary path for trafic flowing to aor form other networks.
backbone
High-speed networking technologies for transmitting data in the form of light pulses.
optical network
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.
dense wavelength division multiplexing (DWDM)
Ability of a single communication channel to carry data transmissions from multiple sources simultaneously.
multiplexing
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.
microwave
The transmission of data using orbiting satellites that serve as relay stations for transmitting microwave signals over very long distances.
satelite
A wireless transmission technology in which the pager beeps when the user receives a message, used to transmit short alphamumeric messages
paging system
a device that transmits voice or data using radio waves to communicate with radio antennas placed within adjacent geographic areas called cells.
cellular telephone (Cell Phone)
a wireless cellular tchnology that uses lower-power, higher-frequency radio waves than does cellular technology.
personal communication services (PCS)
Small, pen-based, handheld computers with built-in wireless telecommunications capable of entirely digital communication transmission.
personal digital assistants (PDA)
Wireless phone with voice, text, and Internet capabilities.
smart phone
Wireless networks that enable two-way transmission of data files cheaply and efficiently
mobile data networks
A change in signal from positive to negative or vice versa that is used as a measure of transmission speed.
baud
The capacity of a communications channel as measured by the difference between the highest and lowert frquencies that can be transmitted fy the channel.
bandwidth
A telecommunications network that requires its own dedicated channels and that encopasses a limited distance, usually one building or serveral buildings in close proximity.
local area network (LAN)
Special software that routes and manages communications on the network and coordinatd network resources.
network operating system (NOS)
Network architecture that gives equal power to all computers on the network; used primarily in small networks
peer-to-peer
The way in which the components of a network are connected.
topology
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.
star network
Network topology linking a number of computers by a single circuit with all messages bradcast to the entire network.
bus network
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.
ring network
Stands for Wireless Fidelity and refers to the 802.11 family of wireless networking standards.
Wi-Fi
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.
802.11b
Box consisting of a radio receiver/transmitter and antennae that link to a wired network, router, or hub.
access point
Add-in card (network interface card) that has a built-in radio and antenna.
wireless NIC
A specific geographic location in which an access point provides public Wi-Fi network service.
hot spot
Standard for wireless personal area networks that can transmit up to 722 Kbps within a 10-meter area.
bluetooth
Telecommunications network tht spans a large geographical distance. May consist of a variety of cable, satelite, and microwave technologies.
wide aea network (WAN)
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
switched lines
Telephone lines that are continuously available for transmission by a lessee. Typically conditionaed to transmit data at high speeds for high-volume applications.
dedicated lines
Network that spams a metropolitan area, usually a city and its major suburbs. Its geographic scope falls between a WAN and a LAN
metropolitan area network (MAN)
Private,multipath, data-only, third-party-managed network that multiple organizations use on a subscription basis.
value-added network(VAN)
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.
frame relay
A networking technology that parcels information into 53-byte cells, allowing dat to be tranmitted between comuters form different vendors at high speeds.
asynchronous transfer mode (ATM)
International standard for transitting voice, data,image,a nd video to sulpport a wide range of services over the public telephone lines.
Integrated Services Digital Network (ISDN)
A group of technologies providing high-capacity transmission over existing copper telephone lines.
digital subscriber line (DSL)
Modem designed to operate over cable TV lines to provide high-speed asscess to the Web or corporate intranets.
cable modem
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.
T1 line
High-speed transmission technology. Also designated a single communications medium that can transmit multiple channels of data simultaneously
broadband
Network with technology to enabel voice, video, and data to run over a single network.
converged network
A system for digitizing a spoken message and transmitting it over a network
voice mail
A machine that digitizes and transmits documents with both text and graphics over telephone lines.
facsimile (fax)
The ability to confer with a group of people simultaneously using the telephone or e-mail group communication software.
teleconferencing
Telconferencing in which two or more users are able to edit and modify data files simultaneously
dataconferencing
Teleconferencing in which participants see each other over video screens.
videoconferencing
Education or training delivered over a distance to individuals in one or more locations.
distance learning
Instruction delivered through purely digital technology, such as CD-ROMs, the Internet, or private networks.
e-learning
The direct computer-to-computer exchange between tow organizations of standard business transaction documents.
electronic data interchange (EDI)