A+

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Author:
fa31
ID:
127249
Filename:
A+
Updated:
2012-01-11 21:28:51
Tags:
IT
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Description:
IT A+
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  1. Expansion Bus : PCI
    Bus Width: 32-bit; (Frequency 33MHz, Max. Data Rate 133MB/s); (Frequency 66MHz, Max. Data Rate 266MB/s)
  2. Expansion Bus : AGP
    Bus Width: 32-bit; (Frequency 31x = 66MHz, Max. Data Rate 266MB/s); (Frequency 2x = 66 MHz (double pumped to 133MHz), Max. Data Rate 533MB/s); (Frequency 4x = 66 MHz (quad pumped to 266MHz), Max. Data Rate 1GB/s); (Frequency 8x = 66 MHz (octo-pumped to 533MHz), Max. Data Rate 2GB/s)
  3. Expansion Bus : AGP
    Bus Width: Serial, consists of between 1 and 16 full-duplex lanes; (Frequency: Version 1 = 2.5GHz , Max. Data Rate: 250MB/s per lane); (Frequency: Version 2 = 5GHz, Max. Data Rate: 500MB/s per lane) (Version 3 = 8GHz, Max. Data Rate: 1GB/s per lane)
  4. POST
    Power-On Self Test
  5. memory address always assigned to the first instruction in the ROM BIOS startup program
    FFFF0h
  6. NTLDR
    (abbreviation of NT loader) is the boot loader for all releases of Windows NT operating system up to and including Windows XP and Windows Server 2003. NTLDR is typically run from the primary hard disk drive
  7. Double Data Rate (or DDR) is actually SDRAM that has been double-pumped
    Clock speed × bytes × 2 = Data Transfer RateExample: 100 MHz × 8 × 2 = 1,600MB/s
  8. Serial ATA (SATA), SAS STP
    Serial transfer speeds Ultra DMA mode 6, serial ATASAS STP up to Revision 1 -1.5 GB/sec; Revision 2.x - 3 Gb/sec; Revision 3.x - 6 Gb/sec SSD drives
  9. RAID (an acronym for redundant array of independent disks)
    RAID 0 (block-level striping without parity or mirroring) has no (or zero) redundancy; RAID 1 (mirroring without parity or striping), data is written identically to multiple drives; RAID 5 (block-level striping with distributed parity);
  10. PATA Standards
    ATA/ATAPI 4 33MB/s (33MHz) ATA-4 or Ultra ATA/33; ATA/ATAPI 5 66MB/s (66MHz) ATA-5 or Ultra ATA/66; ATA/ATAPI 6 100MB/s (100MHz) ATA-6 or Ultra ATA/100; ATA/ATAPI 7 133MB/s (133MHz) ATA-7 or Ultra ATA/133
  11. ATA-6 introduced 48-bit addressing
    allows for a maximum hard drive capacityof 144 petabytes; Previous versions had a maximum drive size of only 137GB
  12. SCSI Standards
    Ultra3 SCSI 160MB/s 68-pin; 80-pin Parallel; Ultra-320 SCSI 320MB/s 68-pin; 80-pin Parallel; Ultra-640 SCSI 640MB/s 68-pin; 80-pin Parallel; SAS (Serial Attached SCSI) 300MB/s SFF 8482, 8484, 8470 Serial ; For the exam, know that the SCSI controller normally uses ID 7

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