CompTIA®A+ Exam Notes : Select The Appropriate Components For A Custom PC


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1. PC Hardware

1.13 Given a scenario, select the appropriate components for a custom PC

1. 32-bit Operating systems (especially, workstation Operating Systems such as XP) usually support only up to 4GB of memory due to address bus limitation. It is recommended to go for 64-bit operating

2. system if you want to use more than 4 GB of memory. 2. SLI technology is designed for PCI Express and not AGP. This new bus has superior bandwidth (two to four times AGP 8X), support for isochronous data transport, and the capability to drive multiple highspeed graphics devices like running video games.

3. Computers used for graphic design, computer-aided design (CAD) applications, and computer-aided manufacturing (CAM) require much more horsepower than the standard PC. Specifically, they require multiple or more powerful processors, more robust video cards, and significantly more memory.

4. SATA hard disks may be used for building RAID arrays.

5. Dynamic disks are not supported in portable computers and on external USB devices. The primary reason being that dynamic disks are used for enabling RAID configuration or back configuration, which requires two or more disks to be present. Usually, portable computers and USB hard disk drives come with single hard drive

6. RAID Level 10 requires a minimum of 4 drives to implement. RAID 10 is implemented as a striped array whose segments are RAID 1 arrays. RAID 10 has the same fault tolerance as RAID level 1. If a disk fails replace the failed disk and see if the RAID builds up. For single disk failures, usually, RAID 10 heals itself.

7. The hardware on the machine must have enough memory, hard drive space, and processor capability to support the virtualization. You also need the software to make virtualization possible.

8. Home Server: Important features of a Home Server are given below:

  • Centralized backup: Backup individual computers at a central location.
  • Health monitoring : Monitor health of individual computers
  • File sharing : Enables file sharing over the home network
  • Printer sharing : Enables printer sharing over the network
  • Remote access gateway : Allows remote access to any connected PC on the network, including the server itself, over the Internet.
  • Media streaming : Can stream media to an Xbox 360 or other devices supporting Windows Media Connect.
  • Selective data redundancy : Guards against a single drive failure by duplicating selected data across multiple drives.
  • Expandable storage : Provides a unified single and easily expandable storage space, removing the need for drive letters.Server backup : Backs up files which are stored within shared folders on the server to an external hard drive.

9. StickyKeys is designed for people who have difficulty holding down two or more keys at a time. When a shortcut requires a key combination such as Ctrl+P, StickyKeys allows you to press one key at a time instead of pressing them simultaneously.

10. Character Map: You can use Character Map to copy and paste special characters into your documents, such as the trademark symbol, special mathematical characters, or a character from the character set of another language.

11. Pointer trails can help people who struggle to track the movement of the pointer on both modern TFT screens and traditional 'tube' CRT screens.

12. A screen magnifier is software that interfaces with a computer's graphical output to present enlarged screen content.

13. When discussing thin and thick clients, you should understand that a thick client is a PC that has all the capabilities of a standard PC. It runs all applications locally from its own hard drive. A thin client is one that has minimal capabilities and runs the from a remote server

14. Wake-On-Lan requires a few settings as below:

  • An ATX motherboard with an onboard, 3-pin "WOL" connector and ATX power supply.
  • A network card that can support WOL with its cable to the motherboard properly installed.
  • In the BIOS Power Management, you must enable the LAN Wakeup option.
  • Then take a look at your network card settings, (right click mouse on "My Computer" icon on your desktop, select Manage -> "Device Manager") in "Device Manager" open properties of your "Network Card" and select "Power Management" tab. You need to check appropriate boxes enabling the Network Card to bring the computer out of standby

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