ICT

• Computer System Servicing (CSS)


  refers to the maintenance, repair, and support services provided for computer systems and related electronic components.
• Hardware Maintenance and Repair

  • Diagnosing and fixing hardware issues such as faulty components, malfunctioning peripherals, or damaged cables.
  • Upgrading or replacing hardware components to improve system performance.
• Software Support

  • Installing, configuring, and updating operating systems and software applications.
  • Troubleshooting and resolving software-related issues.
  • Implementing security updates and patches to protect against vulnerabilities.
• Network Configuration and Support

  • Setting up and configuring computer networks, including routers, switches, and firewalls.
  • Troubleshooting network connectivity issues.
  • Implementing security measures to protect against unauthorized access.
• Preventive Maintenance

  • Conducting routine checks and inspections to identify potential issues before they become serious problems.
  • Cleaning and optimizing computer systems to ensure efficient operations.
• End-User Support

  • Providing technical assistance to end-users, addressing their queries, and resolving issues.
  • Conducting training sessions to improve users' understanding of computer systems and applications.
• Compliance and Security

  • Ensuring that computer systems comply with industry standards and regulations.
  • Implementing security measures to protect against data breaches and unauthorized access.
• Document and Reporting

  • Maintaining detailed records of system configurations, repairs, and maintenance activities.
  • Generating reports on system performance, issues, and resolutions.
• The goal of computer systems servicing

  is to keep computer systems running efficiently, minimize downtime, and maximize user productivity.
• Computer


  is an electronic device that can be programmed to accept data (input), process it and generate result (output).
• Computer System

  primarily comprises a:

  • Central Processing Unit
  • Memory
  • Input/Output devices
  • Storage devices
• Motherboard


  is the main board mounted directly inside the computer case. All other cards plug directly into this.
• Central Processing Unit (CPU)


  is basically like the brain of computer systems. It processes all the information on a computational level.
• Random Access Memory (RAM)


  is a data storage device that can provide fast read and write access. It is volatile memory, meaning it loses all the stored data when power is lost.
• Graphics Processing Unit (GPU) or Graphic Card


  is an output device that processes the data from the motherboard and sends the appropriate information to the computer's screen for display.
• Sound Card


  is built into the motherboard and used for audio output.
• Hard Disk Drive (HDD)


  is still found on many PCs to this day. A mechanical device's purpose is to store all your information for retrieval at any time.
• Solid State Drive (SSD)


  is also a type of hard drive, but it doesn't have any moving bits. It consists of a bank of flash memory that can hold a reasonable amount of information.
• Power Supply Unit (PSU)


  It is mounted inside the computer case. It converts the AC mains supply from the power cord to a wall socket and supplies the correct DC voltages to all parts of a computer.
• Monitor or Visual Display Unit (VDU)


  is an output device to visualize the graphics information sent from the computer's GPU.
• Keyboard


  is an output device that is one of the ways to communicate with a computer. Typing a key from this and then sending a small portion of information to tell it which key was pressed.
• Mouse


  is an output device that allows the user to move a pointer displayed on the monitor and experience a more intuitive interaction with computer systems.
• Printer


  can take an image sent by a computer and deliver it onto a sheet of paper.
• Scanner


  can take anything on paper, and it functions by scanning it to produce a replicated digital image for a computer to save.
• Components of a Computer System

  • Hardware
  • Software
  • Network
• Hardware


  includes the physical parts of a computer.
• Software


  in a computer system, this is basically a set of instructions or commands that tell a computer what to do.
• Two Types of Software

  • System Software
  • Application Software
• System Software


  is software that directly operates the computer hardware and provides the basic functionality to the user as well as to the other software to operate smoothly.
• 3 Types of System Software

  • Operating System (OS)
  • Language Processor
  • Device Driver
• Operating System (OS)


  Main program of the computer system. For example, Windows, Linux, MacOS, Android and so on.
• Language Processor


  It converts programs written in high-level programming languages like Java, C, C++, Python, etc.
• Device Driver


  is a program software that controls a device and helps that device to perform its functions.
• Application Software


  performs special functions or provides functions that are much more than the basic operation of the computer.
• 3 Types of Application Software

  • General Purpose Software
  • Customized Software
  • Utility Software
• General Purpose Software


  This type of application software is used for a variety of tasks, and it is not limited to performing a specific task only. For example, Word, Excel, Power Point, Gmail, Netflix, Google Docs and so on.
• Customized Software


  This type of application software is used or designed to perform specific tasks or functions or designed for specific organizations.
• Utility Software


  This type of application software is used to support the computer infrastructure. It is designed to analyze, configure, optimize and maintains the system, and take care of its requirements as well.
• Network


  is a set of computers sharing resources located on or provided by network nodes. Computers use common communication protocols over digital interconnections to communicate with each other.
• Ring Network Topology


  each node is connected to its left and right neighbor node, such that all nodes are connected, and that each node can reach each other node by traversing nodes left or rightwards.