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SCSI Specifications

SCSI Standard Number/Name Bus Width Throughput (MBps) Cable Pin Count Signaling Max Devices (Incl. Host Adapter) Max Length (M) SCSI-1/ “Regular” SCSI 8 5 50 SE 8 6 HVD 8 25 SCSI-2/ Fast SCSI Fast narrow 8 10 50 SE 8 3­ HVD 8 25 SCSI-2/ Fast wide SCSI 16 20 68 SE 16 3 […]

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Protocols

Protocol Description IPX / SPX (NWLink) Internetwork Packet Exchange/Sequenced Packet Exchange. The default network protocol for Novell Netware prior to NetWare 5. (Current default is TCP/IP). NWLink is the Microsoft version of IPX/SPX. NETBEUI / NetBIOS These two terms are grouped together by many technical resources, which can be misleading. NetBEUI is the NetBIOS Extended […]

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File System

FAT16 Advantage Disadvantage Compatibility with all Microsoft OS and some UNIX Root folder limited to 512 entries MS-DOS boot floppy can access 4 GB theoretical size 2 GB maximum in Windows XP Efficient for small volumes (< 256 MB) Boot sector not backed up No file system security No compression scheme FAT32 Advantage Disadvantage No […]

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Drive Interface Standards

Interface Standard Speed Notes IDE/ATA 2.1 MBps – 8.3 MBps 528 MB limit PIO modes 0-2 ATA-2/Fast ATA 16.6 MBps > 528 MB, 4 IDE devices PIO modes 3-4 DMA 1-2 ATA-3 Nominal speed increase SMART ATAPI-4, Ultra ATA, Fast ATA-2, Ultra DMA Modes 0-2, DMA/33 33 MBps Introduced DMA modes and 80-conductor cable ATAPI-5, […]

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Command Line Utilities

Attrib Displays, sets, or removes the read-only, archive, system, and hidden attributes assigned to files or directories. Used without parameters, attrib displays attributes of all files in the current directory. Syntax attrib [{+r | -r}] [{+a | -a}] [{+s | -s}] [{+h | -h}] [[Drive:][Path] FileName] [/s[/d]] Parameters +r Sets the read-only file attribute. -r […]

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Cables

Cable Type Common Name Physical Layer Name Speed Max Length (M) RG-6 Satellite TV N/A N/A RG-8 Thicknet 10Base5 10 Mbps 50 (drop) 500 (backbone) RG-58 Thinnet 10Base2 10 Mbps 185 RG-59 Cable TV N/A N/A CAT3 UTP Fast Ethernet 10 Base-T 10/100 Mbps 100 CAT4 UTP Fast Ethernet 10 Base-T 16 Mbps 100 CAT5 […]

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Bus Bandwidth

Bus Type Bus Width (Bits) Bus Speed (MHz) Data Cycles Per Clock Bandwidth (MBps) PCI 32 33 1 133 PCI 66 MHz 32 66 1 266 PCI 64-bit 64 33 1 266 PCI 66 MHz/64-bit 64 66 1 533 PCI-X 66 64 66 1 533 PCI-X 133 64 133 1 1066 PCI-X 266 64 266 […]

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IP Address Classes

Address Class Network ID Default SN Mask # Networks # Hosts Class A 1-126.0.0.0 (0) 255.0.0.0 126 16,777,214 Class B 128-191.0.0.0 (10) 255.255.0.0 16,384 65,534 Class C 192-223.0.0.0 (110) 255.255.255.0 2,097,152 254 Class A Loopback Address: 127.0.0.0 Private IP Addresses Class A 10.0.0.1 – 10.255.255.254 Class B 172.16.0.1 – 172.31.255.254 Class C 192.168.0.1 – 192.168.255.254

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Major Operating System Files

Windows 9x AUTOEXEC.BAT Plain text file. Batch file that executes command prompt instructions. Configures command prompt environment and loads TSRs. COMMAND.COM Command interpreter. Provides user interface to command prompt & processes keyboard commands. Contains other internal commands such as CD, COPY, VER, DIR. CONFIG.SYS Plain text file. Activates memory areas and loads real-mode device drivers […]

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