Symantec 10490452 Administration Guide - Page 250

250 Glossary virus A piece of programming code inserted into other programming to cause some unexpected and, for the victim, usually undesirable event. Viruses can be transmitted by downloading programming from other sites or present on a diskette. The source of the file you are downloading or of a diskette you have received is often unaware of the virus. The virus lies dormant until circumstances cause the computer to execute its code. Some viruses are playful in intent and effect, but some can be harmful, erasing data or causing your hard disk to require reformatting. virus attack A series of virus-infected emails from a specific domain. Symantec Mail Security for SMTP allows you to choose an action to perform on these messages; by default messages received from violating senders are deferred. Web browser A client program that uses the Hypertext Transfer Protocol (HTTP) to make requests of Web servers throughout the Internet on behalf of the browser user. worm A special type of virus. A worm does not attach itself to other programs like a traditional virus, but creates copies of itself, which create even more copies. WWW (World Wide Web) An application on the Internet that allows for the exchange of documents formatted in Hypertext Markup Language (HTML), which facilitates text, graphics, and layout. As the World Wide Web has grown in popularity, its capabilities have expanded to include the exchange of video, audio, animation, and other specialized documents. The World Wide Web is also a system of Internet servers that support specially formatted documents. Another important aspect of the World Wide Web is the inclusion of hypertext links that allow users to click links and quickly navigate to other related sites. XML (eXtensible Markup The common language of the Web that is used to exchange information. Language)