Questions and Answers
What does LAN stand for?
Local Area Network
What is the function of a modem?
A virus infects other programs in the system and spreads by replicating itself. True or False?
True
A _maintenance procedure involves the routine updating of master files and changing data formats.
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Match the type of virus with its description:
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Study Notes
Maintaining Computer Systems and Networks
- Technical terms:
- OHS: Occupational Health and Safety
- LAN Card: Local Area Network interface card
- Server: A special computer that users on the network can access to carry out a particular job
- Port Hub/Port: A connector on the back of a computer or other device
- Modem: A device that allows a computer to share data or exchange information
- USB: Universal Serial Port
- Scanner: An input device that reads text or illustrations printed on paper and translates the information into a form that a computer can use
- Printer: A hardware device that produces a paper copy of the information generated by the computer
- Flash drive: A portable storage device that plugs directly into a USB port
- Network: A group of computers and associated devices connected by communications facilities
- OS: Operating system software that controls the allocation and use of programs and data
- Motherboard: Contains the CPU, BIOS, Memory, mass storage interfaces, serial and parallel ports, expansion slots, and controllers required to control standard peripheral devices
- UTP: Unshielded Twisted Pair, the least expensive and most popular network media
Plan and Prepare for Maintenance and Repair
- Importance of planning and preparing systematic maintenance procedures:
- Saves time, money, and frustration
- Ensures trouble-free use and optimal performance
- Allows for proper care and maintenance of computer systems
- Types of maintenance procedures:
- Hardware maintenance: Testing and cleaning of equipment
- Information system maintenance: Routine updating of master files
- Software or program maintenance: Updating application programs to meet changing information requirements
- Disk or file maintenance: Periodic reorganizing of disk files that have become fragmented
Workplace Procedures
- Identify hazards and assess risk:
- Execution of OHS policies and procedures
- Follow instructions and procedures in the workplace with minimal supervision
- Tools:
- Programs used for software development or system maintenance
- Programs that help users analyze or search for data
- On-screen functions in graphics programs
- Software control panels for setting user preferences
- Personal Protective Equipment:
- Anti-static devices to protect against electrostatic discharge
- Power surge protectors to protect against sudden power surges
- Personal equipment such as small paintbrushes, screwdrivers, pliers, and tweezers
Periodic Maintenance Scheme
- Daily schedule:
- Update virus and spyware definitions
- Do incremental backup of updated files
- Reboot upon crash
- Weekly schedule:
- Full virus and spyware scan
- Complete backup of files
- Patch up with latest software updates
- Monthly schedule:
- Clean PC inside and out
- Defragment hard drive
- Yearly schedule:
- Check and clean up unused programs
- Reformat hard drive and reinstall operating system
- Make a full diagnostic check on hardware and software
Removing Viruses from Infected Machines
- Computer Virus:
- A destructive executable program that infects other programs in the system and spreads by replicating itself
- Designed to damage victim's computer files
- Different aspects of computer viruses:
- Finder: Searches for new uninfected files and targets them
- Replicator: Infects files by multiplying itself
- Sources of virus infection:
- Infected CDs, DVDs, pen drives, etc.
- Browsing infected sites
- Downloading files from the internet
- Steps to remove viruses:
- Buy or download antivirus software
- Install and update antivirus software
- Do a complete system scan
- Methods of eliminating viruses:
- Removing the virus from the host file
- Quarantining the file to render the virus inactive
- Types of viruses:
- Boot viruses
- Program viruses
- Multipartite viruses
- Stealth viruses
- Polymorphic viruses
- Macro viruses
- Examples of antivirus software:
- Symantec Norton Antivirus
- AVG Antivirus
- McAfee Scan
- Microsoft Antivirus
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Description
This quiz covers technical terms and concepts related to maintaining computer systems and networks, including occupational health and safety, LAN cards, servers, port hubs, and modems.
