A Free Educational Resource Created by Carnegie Mellon University to Empower You to Secure Your Part of Cyberspace

Internet basics

  • Active Content Interactive Web content that can carry malicious code
  • Bandwidth How fast information can be moved from one computer to another
  • Blogging Publishing an online diary
  • Bluetooth A way for portable devices to communicate with each other over short-distances
  • Bookmark A browser feature that allows you to click to a Web site, rather than have you type the address.
  • Cache Temporary data storage area on your computer
  • Chat Code A system of symbols, acronyms, and abbreviations used online
  • Chat Room Virtual locations on the Internet where two or more users can communicate with one another in real time
  • Client A computing system that acts like a user by requesting services from another computer called a server
  • Communications Protocol A set of rules or standards that allow two computers to "talk" to each other.
  • Confidentiality Accessibility of computer information exclusively to those authorized to access it
  • Cookie Information, usually in a file, about someone’s Internet activities, such as the date of the last visit to a Web site, preferences, etc.
  • Decryption Conversion of a coded message to a readable form
  • Demilitarized Zone (DMZ) The protective hardware and software between an internal network (LAN) and the external network (Internet)
  • Digital Dirt Traces left behind of your Internet activity that could reflect poorly on you
  • Digital Identity A name and credentials created to participate in electronic transactions
  • Digital Rights Management A system that restricts use of digital media to only the rightful owner
  • Digital Signature A special file used to confirm the identity of the sender and integrity of an electronic document
  • Digital Subscriber Line (DSL) A method of digital data transmission over the telephone network
  • Digital Wallet The electronic equivalent of a wallet for e-commerce transactions
  • Domain Name A string of text that identifies one or more computers on the Internet
  • E-commerce Buying items online and conducting business over the Internet
  • E-money Activities such as online banking, online money transfers and online trading
  • Easter Egg A hidden feature or functionality in software that usually activates only when certain keystrokes or commands are typed
  • Electronic Auctions Auctions where the transaction takes place over the Internet
  • Email A system for sending and receiving electronic messages over a computer network
  • Email Client A software application that handles electronic mail
  • Ethernet A communication protocol that provides rules for signaling and communication between two computers or devices on a local area network
  • Extensible Markup Language (XML) A computer language that can be used across many different computer operating systems and environments.
  • File Sharing Making files available for others to download, or downloading such files
  • File Transfer Protocol (FTP) A common method for transferring files between two computers on a network
  • Firmware Software that is embedded in hardware
  • Fisking Criticism that highlights perceived errors or other problems in a statement, article, essay or blog entry
  • Flaming Posting messages that are deliberately hostile and insulting
  • Geographical Information Systems (GIS) A system for collecting, analyzing and managing spatially related data
  • HTTP A communication protocol that defines how messages are sent across the World Wide Web
  • Hyper Text Markup Language (HTML) A computer language that is used for creating World Wide Web pages
  • IP Address A number used to identify a computer or other device on the Internet
  • Instant Messaging (IM) A communication service that allows you to chat online using text messages
  • Internet The world’s biggest computer network, providing many services, including email, e-commerce and multimedia
  • Internet Message Access Protocol (IMAP) Email protocol that allows you to access email via the Internet
  • Internet Privacy The general freedom from compromise of your personal or other sensitive information while using the Internet
  • Internet Protocol (IP) A set of rules used by the Internet for computer communication and addressing
  • Java Popular programming language
  • JavaScript Java-based scripting language for Web pages
  • Leetspeak A way of communicating online in code by changing the spellings of words
  • Lightweight Directory Access Protocol (LDAP) A phonebook-like method for accessing and compactly presenting information on users and resources available on a computer network
  • Local Area Network (LAN) A group of computers within a small area, such as a house, office or school, that are connected to each other
  • MAC Address A unique identifier for network interface cards
  • Mobile Browsing Using a mobile phone to access the Internet
  • Mobile Device Portable devices for communication and computation
  • Moblogging An application that lets you read and write emails using a Web browser
  • Netiquette A code of conduct followed on the Internet in order to be respectful and clearly understood (Internet + etiquette)
  • Network Address Translation A method for hiding the internal structure of a network and allowing it to use a single public IP address
  • Online Dating A web service for establishing friendships and romantic relationships
  • Online Identity A social identity that network users establish in online communities
  • Password A string of letters, numbers and/or symbols that grants access to something private
  • Pay Per Click An arrangement whereby Web advertisers pay Web site owners for each click on an advertisement.
  • Photo Sharing Sharing and distributing digital photos over the Internet
  • Plug-in A software module that adds some specific service or function to a larger system
  • Pop-up Blocker Software to suppress automatically displayed browser windows, called pop-ups, which are often used for advertisements
  • Port An interface on a computer used to connect it to another device
  • Portable Document Format (PDF) A format of electronic documents that permits viewing and accessing without the need to have the software that originally created it
  • Post Office Protocol (POP) Email protocol that downloads email to your computer
  • Proxy Server A server used to make an Internet connection from certain computers
  • RSS A tool for incrementally or selectively downloading digital content from frequently updated sources, such as news sites
  • Radio-Frequency Identification A means of uniquely identifying objects via radio-frequency communication
  • Remote Desktop (RD) Technology that allows you to interact with a remote computer as if it were in front of you
  • Search Engine Software that quickly finds information on the Web
  • Server Computer system that provides shared resources over a network
  • Social Networking Sites Sites that let you post a profile and create a network with other people
  • Streaming Media Media that can be played while it is still being received
  • Team Dating An online service facilitating social interactions among groups
  • Transmission Control Protocol/Internet Protocol (TCP/IP) The set of rules for communication on which most major networks are based
  • Uniform Resource Locator (URL) Address of a Web page or other Web resource
  • Virtual Private Network (VPN) The set of rules for communication on which most major networks are based
  • Virtual Tourism The activity of "visiting" sites of interest over the Internet without having to physically travel to them
  • VoIP Technology that allows you to make telephone calls using the Internet
  • Web 2.0 The second generation of the World Wide Web, characterized by social networking and a high degree of content created by users
  • Web Browser Software that allows you to view Web pages
  • Web Page The basic unit of information on the Web
  • Web Site A group of Web pages with related content and a home page as a main point of entry
  • Web Traffic Measurements of the frequency and time spent by Web site visitors on a site, which indicate the popularity and utility of the site
  • Webmail An application that lets you read and write emails using a Web browser
  • WiFi Wireless Fidelity, shorthand for various wireless networking technologies
  • Wiki A type of Web site that allows users to easily add and edit content using any Web browser
My home page