Please enable JavaScript.

Coggle requires JavaScript to display documents.

CHAPTER 3 SYSTEM SOFTWARE, 3.2 FUNCTION OF OPERATING SYSTEM, GROUP MEMBERS…

- - - - PERSONAL FIREWALL
        A personal firewall is a security tool that detects and protects a personal computer and its data from unauthorized intrusions
      - ANTIVIRUS PROGRAM
        An antivirus protects a computer against viruses by identifying and removing any computer viruses found in the memory, on storage media, or on incoming
      - MALWARE REMOVERS
        Malware remover provides tools that are used to specifically take malware out of an infected computer, should a virus somehow pass through an antivirus software check. Malware includes active viruses, contained viruses and inactive malware that may be hidden and lurking on the infected computer.
        
        SPYWARE
        
        Is a type of program places on a computer or mobile device without the user’s knowledge that secretly collects information about the user and the communicates the information it collects to some outside source while the user is online
        
        A spyware remover is a type of program that detects spyware and similar programs
        
        ADWARE
        
        Is a type of program that displays an online advertisement in a banner or pop-up or pop-under window on webpages, email messages, or other internet services
        
        An adware remover is a program that detects and deletes adware
      - INTERNET FILTERS
        Internet filters are programs that remove or block certain items from being displayed
        
        Anti-spam programs
        • Attempts to remove spam before it reaches inbox or forums
        
        Web filtering software
        • Restricts access to certain material on the web
        
        Phishing filters
        • Warns or blocks from potential fraudulent or suspicious websites
        
        Pop-up and pop-under blockers
        • Stop pop-up or pop-under ads from displaying on webpages
  - - - FILE MANAGER
        A file manager is a tool that performs
        functions related to file management
      - SEARCH TOOL
        
        A search tool is a program, usually included with an operating system, that attempts to locate a file, contact, calendar event, app, or any other item stored on your computer
        
        other example : google, yahoo
      - IMAGE VIEWER AND UNINSTALLER
        
        An image viewer is a tool that allows users to display, copy, and print the contents of a graphic file, such as a photo
        
        An uninstaller is a tool that removes a program, as well as any associated entries in the system files
      - BACKUP AND RESTORE
        
        A backup tool allows users to copy, or back up, selected files or the contents of an entire storage medium to another storage location
        
        A restore tool reverses the process and returns backed up files to their original form
        
        example : dvd-r, one drive
      - DISK CLEANUP
        
        A disk cleanup tool searches for and removes unnecessary files
        
        example: piriform Cleaner
      - DISK DEFRAGMENTER
        
        A disk defragmenter is a tool that reorganizes the files and unused space on a computer’s hard disk so that the operating system accesses data more quickly and programs run faster
        
        example : deflagger and perfect disk
      - SCREEN SAVER
        A screen saver is a tool that causes a display device’s screen to show a moving image or blank screen if no keyboard or mouse activity occurs for a specified time
      - FILE COMPRESSION
        A file compression tool shrinks the size of a file(s)
      - PC MAINTENANCE
        A pc maintenance tool is a program that identifies and fixes operating system problems, detects and repairs drive problems, and includes the capability of improving a computer’s performance
- - - - Android is an open source, Linux-based mobile operating system designed by Google for smartphones and tablets
      - iOS, developed by Apple, is a proprietary mobile operating system specifically made for Apple’s mobile devices
      - Windows Phone, developed by Microsoft, is a proprietary mobile operating system that runs on some smartphones
- - - - Usually what is displayed on the desktop is a foreground program while what is hidden partially or completely behind the foreground program is a background program.
    - - Some operating systems support a single user and some support thousands of users running thousands of programs.
      - A program that only allows one user at a time is a single user/single task operating system.
      - A multitasking operating system allows a single user to work on two or more programs that are in memory at the same time.
  - - - To manage system resources and troubleshoot network connectivity, network administrators and other advanced users work with command line interfaces, to configure devices.
      - To enter data and commands in a command line interface, users type commands or press special keys on the keyboard (such as function keys or key combinations).
    - - To issue commands, we must interact with menus and visual images such as buttons and other graphic objects.
      - Links and navigation buttons are used in the GUI operating system when incorporating features similar to Web browsers.