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Details Title: MIS Exam 2 Description: Ch. 8 Terms Total Flash Cards: 34 Created: 04/02/2005 22:15:32	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Telecommunications Definition The communication of information by electronic means, usually over some distance. Term Protocol Definition A set of rules and procedures that govern transmission between the components in a network. Term Analog signal Definition continuous waveform that passes through a communications medium; used for voice communications. Term Digital signal Definition Adiscrete waveform that transmits data coded into two discrete tates as I-bits and 0-bis, which are represented as on-off electricl pulses; used for data communications. Term Modem Definition Adevice for translating digital signals into analog signals and vice vera. Term Channels Definition The links by which data or voice are transmitted between sending and receiving devics in a net-work. Term Twisted wire Definition A transmission medium consisting of pairs of twisted copper wires; used to transmit analog phone conversations but can be used for data transmission. Term Coaxial cable Definition A transmission medium consisting of thickly insulated copper wire; can transmit large volumes of data guickly. Term Fiber-optic cable Definition A fas, light, and durale transmission medium consisting of thin strands o clear glass fiber bound into cables. Data are transmittted as light pulses. Term Backbone Definition Part of a network handling the major traffic and providing the primary path or traffic flowing to or from other networks. Term Optical network Definition High-speed networking technologies for transmitting data in the form of light pulses. Term Satellite Definition The transmission of data usig orbiting satellites that serve as relay stations for tansmitting microwave signals over very long distances. Term Smart phone Definition Wireless phoe with voice, text, and internet capabilities. Term Baud Definition A change in signal from positive to negative or vice versa that is used as a measure of transmission speed. Term Bandwidth Definition The capacity of a communication chnnel as measured by the difference between the highest and lowest frequencies that can be transmitted by that channel. Term Front-end processor Definition A special purpose computer dedicated to managing communications for the host computer in a network. Term Controller Definition A specialized computer that supervises communications traffic between the CPU and the peripheral devices in a telecommunications system. Term Multiplexer Definition A device that enables a single communications channel to carry data transmissions from multiple sourcs simultaneously. Term Topology Definition The way in which the components of a network are connected. Term Star network Definition A network topology in which all computers and other devices are connected to a central host computer. All communications between network devices must pass through the host computer. Term Bus Network Definition Network topology linking a number of computers by a single circuit with all messages broadcast to the entire network. Term Ring Network Definition A network topology in whic all computers are linked by a closed loop in a manner that passes data in one direction from one computer to another. Term Local area network (LAN) Definition A telecommunications network that requires its own dedicated channels and that enompasses a limited distance, usually one building or several buildings in close proximity. Term Gateway Definition A communications processor that connects dissimilar networks by providing the translation from one set f protocols to another. Term Router Definition Device that forwards packets of data from one LAN or WAN to another Term network operating system (NOS) Definition Special software that routes and manages communications on the network and coordinates network resources. Term Bluetooth Definition Standard for wireless personal area networks that can transmit up to 720 Kbps within a 10-meter area. Term Wide Area Network (WAN) Definition Telecommunicationns network that spans a large geographical distance. May consist of a variety of cable, satellite, and microwave technologies. Term switched lines Definition Telephone lines that a person can access from a terminal to transmit data to another computer, the call being routed or switched through paths to the designated destination. Term dedicated lines Definition Telephone lines that are continuously available for transmission by a lessee. Typically conditioned to transmit data at high speeds for high-volume applications. Term packet switching Definition Technology that breaks blocks of data into fixed bundles and routes them in the most economical way through any available communicatoins channel. Term cable modem Definition Modem designated to operate over cable TV lines to provide high-speed access to the Web or corporate intranets. Term voice mail Definition A system for digitizing a spoken message and transmitting it over a network. Term electronic data interchange (EDI) Definition The direct computer-to-computer exchange between two organizations of standard business transaction documents.