Comp PPT remastered

• networking hardware requirements


  1. DSL (digital subscriber line) or network modem
  2. wired or wireless router
  3. wired or wireless network adapter
  4. ethernet cabling
• DSL (digital subscriber line) or cable modem


  connects your computer to a high-speed DSL or cable internet connection
• wired or wireless router


  connects your DSL or cable modem to your home network
• routers have two types of ports at the back:

  • LAN port
  • WAN port
• LAN - local area network
• WAN - wide area network
• there are 4 LAN ports at the back of a router
• there are 2 WAN ports at the back of a router
• wired or wireless network adapeter


  a device in your computer (printers, gaming consoles, and other networking equipment) that connects your computer to your network
• ethernet cabling


  connects your wired network adapters to a router or network switch
• modem


  • connects you to the internet
  • connection between your house and the internet
  • does not require a router to function
• router


  • connects computer to one another
  • connection between your modem and your wireless devices
  • does need a modem to function
• wireless throughput


  throughput is the speed at which a router can transfer data
• the transfer speed of your wireless connection is dependent on the wireless standard it uses
• wired throughput


  the wired half of your router will come in one of two speeds: 10/100 Mbps and 10/100/1000 Mbps (also known as gigabit)
• range


  wireless routers can only reach a limited area of distance
• range


  wireless extenders (aka wireless repeaters) are products you can buy that do exactly what the manuals say to extend your network further
• it is important to maintain your routers and modems in good condition to ensure a smooth and secure internet experience
• possible problems of a system

  1. system has no power at all
  2. system is inoperative
  3. certain keys do not function
• system has no power at all


  • power light does not illuminate
  • fan inside and the power supply does not turn on
  • indicator light on keyboard does not turn on
• probable causes when system has no power

  • power cable is unplugged
  • deffective power cable
  • power supply failure
  • faulty outlet; circuit breaker or fuse blown
• solution if power cable is unplugged

  make sure power cable is securely plugged in
• solution if you have defective power cable

  replace cable
• solution if power supply failed


  contact technical support
• solution if you have faulty outlet; circuit breaker or fuse blown


  • use different socket
  • repair outlet
  • reset circuit breaker
  • replace fuse
• probable causes when system is inoperative


  1. expansion card is partially dislodged from expansion slot on the motherboard
  2. defective floppy disk drive or tape drive
  3. defective expansion card
• solution when expansion card is partially dislodged from expansion slot on the motherboard


  using even pressure on both ends of the expansion card, press down firmly on expansion card
• solution when there's a defective floppy disk or tape drive


  contact technical support
• solution if there's a defective expansion card


  make sure expansion card is secure in expansion socket
• probable causes when certain keys do not function


  1. keys are jammed or defective
• system is inoperative


  • keyboard lights are on
  • power indicator lights are lit
  • hard drive is spinning
• solution when the keys are jammed or defective


  replace keyboard
• backing up means creating a redundant copy of a data so that in case anything happens to the original data, you have a spare copy
• how to backup files in windows 7?


  1. click start
  2. go to control pannel
  3. go to system and security
  4. click backup and restore
  5. at the backup or restore your files screen, click setup backup
  6. select where you want to save the backup and click next
  7. choose let windows choose (recommended)
  8. click next
  9. verify the backup details
  10. click save settings and run backup
  11. the process will now start, this might take some time becuase your system is backing up all data on your system
  12. after the process is finished, the backup or restore the files wizard will display the size of the backup file
• malware refers to any kind of malicious codes, objects or content that infiltrates your computer, resulting in damage and causing your system to act in an undesirable manner
• virus


  a malicious program designed to replicate itself and transfer from one computer to another
• worm


  a malicious program that transfers from one computer to another by any type of means
• trojan


  a malicious program that is disguised as a useful program but once downloaded or installed, leaves your PC unprotected and allows hackers to get your information
• spyware


  a program that runs in the background without you knowing it
• adware


  a program designed to send you advertisements