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Term _________ can serve as sending and receiving devices in a communications system.
-Mainframe computers and servers-Desktop computers and notebook computers-Tablet PCs and PDAs
Term Two examples of ______ are cable television lines and telephone lines.
Definition Communications channels
Term A type of communications device that connects a communications channel to a sending or receiving device is a _____.
Definition Modem
Term ______ is a conversation that takes place over the Internet using a telephone connected to a desktop computer, mobile computer, or mobile device.
Definition Internet telephony
Term ________ Is a real-time Internet communications service that allows wireless mobile devices to exchange messages with one or more mobile devices or online users.
Definition Wireless instant messaging
Term Most hot spots span from _______ feet.
Definition 100 - 300
Term A GPS receiver is a handheld, mountable, or embedded device that contains _______.
Definition - Radio receiver- Antenna- Processor
Term _______ Allows users to share documents with others in real time.
Definition An online meeting
Term Groupware is a component of a broad concept called _____, which includes network hardware and software that enables group members to communicate, manage projects, schedule meetings, and make group decisions.
Definition work group computing
Term A voice mailbox is a(n) _____ in a voice mail system.
Definition Storage location on a hard disk
Term Businesses are the primary users of ______ because this technology provides a means for departments to communicate with each other, suppliers, vendors, and with clients.
Definition Web services
Term Most businesses use a standard, such as a ______, that defines how data transmits across telephone lines or other means.
Definition EDI (electronic data interchange)
Term A _______ is a legal agreement that permits users to install software on multiple computers, usually at a volume discount.
Definition Site license
Term A ______ is a network that connects computers and devices in a limited geographical area, such as a home, school computer lab, or office building.
Definition Local Area Network (LAN)
Term Each computer or device on a local area network, called a _____, often shares resources such as printers, large hard disks, and programs.
Definition A node
Term A _______ is a high-speed network that connects networks in an area such as a city or town and handles the bulk of communications activity across that region.
Definition Metropolitan Area Network (MAN)
Term As showen, a(n) _____ is a network that covers a large geographic area, such as a city, country, or the world, using a communications channel that combines many types of media.

Wide Area Network


Term The design of computers, devices, and media in a network, sometimes called the ______, is categorized as either client/server or peer-to-peer.
Definition Network Architecture

A file server is a dedicated server that ____.

Definition Stores and manages files
Term A print server is a dedicated server that _____.
Definition Manages printers and print jobs.
Term A database server is a dedicated server that ____.
Definition Stores and provides access to a database
Term A network server is a dedicated server that ____.
Definition Manages network traffic (activity).
Term the risk to a bus network is that _____.
Definition The bus itself might become inoperable.
Term A network like the one shown can span a _____ distance than a bus network but is more _____.
Definition Larger distance, but it is more difficult.
Term A ___ network is a network topology in which a cable forms a closed loop, with all computers and devices arranged along it.
Definition Ring network
Term On a ____, such as that illustrated, all of the comuters and devices (nodes) on the network connect to a central device.
Definition Star Network
Term On a network like this one, the central device that provides a common connection point for nodes on the network is called the _____.
Definition Hub
Term On a network such as this one, if one node fails ____.
Definition Only that node is affected.
Term Today, ____ is the most popular LAN technology becasue it is relatively inexpensive and easy to install and maintain.
Definition An Ethernet
Term ____ has been adopted as a network standard for Internet communications.
Definition TCP/IP
Term When a scomputer sends data over the intenet, the data is divided into small pieces, or ____.
Definition Packets
Term The technique of breaking a message into individual packets, sending the packets along the best route avalible, and then reassembling the data is called ___.
Definition Packet Switching
Term One popular use of the _____ network standard is in hot spots that offer mobile users the ability to connect to the Internet with their wireless computers and devices.
Definition Wi-Fi
Term Communications software consists of programs that _____.

- Help users establish a connection to another computer or network.

- Manage the transmission of data, instructions, and information.

- Provide an interface for users to communicate with one another.

Term Although ___ are not a type of standard telephone line, they are very popular ways for the home user to connect to the internet.
Definition Cable Telecision (CATV) lines
Term With ISDN, the same telephone line that could carry only one computer signal now can carry three or more signals at once through the same line, using a technique called ____.
Definition Multiplexing

___ requires a special network card and a __ modem.

Definition DSL
Term The most popular T-carrier line is the ____.
Definition T1 line
Term A T3 line is ____.
Definition equal in speed to 28 T1 lines but quite expensive.
Term For data transmission to occur, ____ of a standard telephone line must have a dial-up modem.
Definition Both the sending and receiving ends
Term A ____ is a device that provides a central point for cables in a network.
Definition Hub
Term Each networked computer in a house can _____.

- Share a single high-speed Internet connection

- Access files and programs on other computers in the house

- Share peripherals such as a printer, scanner, external hard disk, or DVD drive

Term A(n) ____ extends the basic home network to include features such as lighting comtrol, themostat adjustment, and a security system.
Definition Intellient home network
Term Types of wired home networks include all of the following ___, _____, ____.


-Powerline Cable


Term For best performance of a communications channel, _____.
Definition bandwidth should be high and latency low
Term Physical transmission media used in communication include all of the following ___, ____, ___.

- twisted pair cable

- Coaxil cable

- Fiber-optic cable

Term ____ is an electrical disturbance that can degrade communications.
Definition Noise
Term Fiber-optic cables have all of the following advantages over cables that use wire ___, ___, ___.

- faster data transmission and smaller size

- less suscptivle to noise from other devices

- better security for signals during transmission

Term Broadcast radio is ____ susceptible to noise than physical transmission media but it provides flexibility and portability.
Definition Slower and more
Term ____ is a category of cellular transmission that transmitted analog data.
Definition 1G (first generation)
Term Microwave transmission, sometimes called ____, involves sending signals from one microwave station to another.
Definition fixed wireless
Term A(n) ___ device is a device that initiates an instuction to transmit data, instructions, or information.
Definition Sending device
Term A(n) ____ device is a device that accepts the transmission of data, instructions, or infromation.
Definition Recieving device
Term With ___, users type and send short test messages on a smart phone or PDA.
Definition SMS
Term ____ allows users to send graphics, pictures, video clips, and sound files, as well as short text messages to other smart phones, PDAs, or computers.
Definition MMS
Term A(n) _____ network uses cellular radio technology to provide users with highspeed internet connections, as long as they are in the networks range.
Definition 3G
Term A(n) ______ is a navigation system that consists of one or more earth-based receivers that accept and analyze signals sent by satellites in order to determine the reciever"s geographic location.
Definition GPS
Term Many software products provide a means to _____, or work online, with other users connected to a server.
Definition Collaborate
Term _____ Allows users connected to a network to transfer money from one bank account to another via transmission media.
Definition EFT
Term A(n) _____ is a third-party business that provides networking services such as scure data and information transfe, storage, e-mail, and management reports.
Definition VAN
Term A(n) ____ is a LAN that uses no physical wires.
Definition WLAN
Term On a network such as this, a(n) _____ computer controls access to the hardwware, software, and other resources on the network and provides a centralized storage area for programs, data, and information.
Definition Host
Term A _____ network is a network topology that consits of a single central cable, to which all computers and other devices connect.
Definition A bus
Term The _____ standard specifies that computers and devices on the network share or pass a special signal, called a token, in a unidirectional manner and in a present order.
Definition token ring
Term ____ is a network technology that defines how messages are routed from one end of a network to the other, ensuring the data arrives correctly by dividing it into packets.
Definition TCP/IP
Term ____ technology uses short-range radio waves to transmit data between two devices.
Definition Bluetooth
Term _____ is a newer network standard developed by IEEE that specifies how wireless devices communicate over the air in a wide area.
Definition WiMAX
Term The ______ specifies how some wireless mobile devices such as smart phones and PDAs can display the content of the Internet services such as the Web, e-mail, chat rooms, and newsgroups.
Definition WAP
Term The _____ is the worldwide telephone system that handles voice-oriented telephone calls.
Definition PSTN
Term _____ is a set of standards for digital transmission of data over standard copper telehone lines.
Definition ISDN
Term ____ transmits at fast speeds on ezisting standard copper telephone wiring, but requires that the user"s location and the telephone company"s modem be located within a certain distance of each other.
Definition DSL
Term _____ is a type of DSL that supports faster transmission rates when receiving data (the downstream rate) than when sending data (then upstream rate).
Definition ADSL
Term ______ uses fiver-optic cable to provide extremely high-speed Internt access to home users.
Definition FTTH
Term _____ is a service that carries voice, data, video, and mltimedia at extremely high speeds.
Definition ATM
Term A DSL _____ sends digial data and information from a computer to a DSL line and reveives digital data and information from a DSL line.
Definition Modem
Term A(n) ____ is an adapter card, PC Card, or flash card that enables a computer or devies to access a network.
Definition NIC
Term A ____ network is a home network that uses radio waves, instead of cables, to transmit data.
Definition Home RF
Term The amount of data, instructions, and information that can travel over a communications channel sometimes is called the ____.
Definition Bandwidth
Term _____ is the time it takes a signal to travel from one location to another on a network.
Definition Latency

With _____ service, an optical terminal at your house receives the signals and transfers them to a router connected to your computer.

Definition FTTH
Term ____ is a computer phrase that points out the accuracy of a computer"s output depends on the accuracy of its input.
Definition Garbage in, garbage out
Term Accurate information ______.
Definition is error free
Term Verifiable information _____.
Definition can be proven as correct or incorrect.
Term Timely information _______.
Definition has an age suited to its use
Term Organized information _______.
Definition Is arranged to suit the needs and requirements f a decision maker.
Term Accessible information _______.
Definition is available when a decision maker needs it.
Term Useful information _____.
Definition has meaning to the person who reeives it.
Term Cost-effective information ________.
Definition gives more value than it costs to produce.
Term A database contaions files, a file contains ______.
Definition records, a record contains fields, and a field is made up of characters.
Term A _____ is the smallest unit of data a computer can process.
Definition bit
Term _______ is a common data type that consists of dollar and cent amounts or numbers containing decimal values.
Definition Currancy
Term _____ is a common data type that consists of lengthy text entries.
Definition Object
Term _____ is a common data type that consists of Web addresses that link you to a document or Web page.
Definition Hyperlink
Term Users add new records to a file ______.
Definition When they obtain new data
Term Generally, users change records in a file ___.
Definition to correct inaccurate data and to update old data with new data.
Term _____, a user deletes it from a file.
Definition When a record is no longer needed.
Term When a program flages a deleted record, the record _____ process it.
Definition Remains physically on the disk but is delted logicall because the program will not
Term Deleting un-needed files ____ storage space.
Definition Reduces the size of files and frees up
Term If the lowest annual fee at a dicount warehouse is $20.25 and the highest is $55.50, a(n) ____ on the Annual Fee field ensures it is a value between $20.25 and $55.50
Definition range check
Term A(n) ___ tests the data in two or more associated fields to ensure that the relationship is logical.
Definition Consistancy check
Term A(n) ____ verifies that a required field contains data.
Definition Completeness check
Term A program determines the ___ by applying a formula to the numbers in the primary key value.
Definition check digit
Term A major weakness of a lot of file processing systems is that _____.
Definition They have redundant data and they isolate data.
Term A(n) _____ program interacts with a DBMS, which in turn interacts with the database.
Definition front-end
Term When compared with a file processing system, a database offers all of the following _____.

- reduced data redundancy

- easier access and shared data

- reduced development time

Term A DBMS uses the _____ to perform validation checks.
Definition Data dictionary
Term Commonly used methods to retrieve and maintain data include all of the following.

- report generators and forms

- query languages

- query by example

Term Although a query language can be used for other purposes, most users only ____ data with a query language.
Definition retrieve
Term A checkout clerk with ____ privileges to the e-mail addresses in a discount warehouse database could view the addresses but not change them.
Definition read-only
Term A manager would have ___ pribeleges to member data in a discoundt warehouse database.
Definition full-update
Term Occasionally, a database can be damaged or destroyed because of ________.

- hardware or software failure

- human error

- a catastrophe, such as a fire or flood

Term In a log, a DBMS places _______.

- a copy of a record prior to a change

- the actual change to a record

- a copy of a record after a change

Term Popular data models in use today include all of the following:

- relational



Term In a relational database, each row ____.
Definition has a primary key and each column has a unique name
Term A user of a relational database, such as this one, refers to a file as a ______.
Definition Table
Term A user of a relational database, such as this one, refers to a record as a ____.
Definition Row
Term A user of a relational database, such as this one, refers to a feild as _____.
Definition Column
Term In a relational database, such as this one, a _____ is a connection within the data.
Definition Relationship
Term In a relational database, such as this one, users can set up a relationship between tables at any time, but the tables must have a common ______.
Definition Column
Term Most _____ database products for servers and mainframes include SQL, an example of which is shown.
Definition Relational
Term _____, as shown, is a query language that allows users to manage, update, and retrieve data.
Definition SQL
Term Compared with relational databases, object-oriented dadtabases ______.

- Can store more types of data

- Access data faster

- Allow programmers to reuse objects

Term A ____ stores images, audio clips, and/or video clips.
Definition multimedia database
Term A _____ stores documents such as schedules, calendars, manuals, memos, and reports.
Definition Groupware database
Term A ____ stores data about engineering, architectural, and scientific designs.
Definition Computer-aided design (CAD) database
Term The advantage of multidimensional database is that ____.
Definition It can consolidate data much faster than a relational database
Term Many e-commerce sites use ____ to determine customer preferences.
Definition Data mining
Term A Web database usually resides on a(n) _____.
Definition Database server
Term To access data in a ____, users fill in a form on a Web page.
Definition Web database
Term The DA does all of the following:

- Decide on the proper placement of fields

- Define the relationships among data

- Identify users" access privileges

Term The DBA does all of the following:

- Manage security of the database

- Monitor the performance of the database

- Check backup and recovery procedures

Term With a(n) ____, users create a computerized database; add change and delete data in the database; sort and retrieve data from the database; and create forms and reports from the data in the database.
Definition DBMS
Term In the ASCII and EBCDIC coding schemes, each byte represents a single ____, which can be a number, letter, punctuation mark, or other symbol.
Definition character
Term ____ is a common data type that includes letters, numvers, or special characters.
Definition Text.

Yes/No (also called ____) is a common data type that includes only the values Yes or No (or True or False).

Definition Boolean
Term Object (also called ____) is a common data type that includes photograph, audio, video, or a document created in other applications.
Definition BLOB
Term In a database, a(n) ______ is a group of related fields.
Definition record
Term In a database, a(n) ____ field is a field that uniquely identifies each record in a file.
Definition Key
Term A(n) ____ check is a calidity check performen on data, like the one shown, which ensures users enter only alphabetic data into a field.
Definition Alphabetic
Term A(n) ___ check is a validity check performed on data like that shown, which ensures users enter only numeric data into a field.
Definition Numeric
Term A(n) ____ check is a validity check that determines whether a number is within a specified group of numbers
Definition Range
Term A(n) ____ is a program with which users interact that generally has a more user-friendly interface the DBMS.
Definition front end
Term An application that supports a front-end program sometimes is called the _____.
Definition back end
Term A(n) ____ contains dadta about each file in a database and each field in those files.
Definition repository
Term Most DBMSs include a(n) _____ feature, like the one shown, which has a grahical user interface to assist users with retriecing data.
Definition QBE
Term More complex DBMSs maintain a(n) _____, which is a listing of activities that change the contents of a database.
Definition log
Term A DBMS that creates a log usualy provides a(n) ____ utility that uses the logs and/or backups to restore a database when it becomes damaged or destroyed.