Archive for the ‘A+2006’ category

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What is Automated System Recovery?

October 31st, 2009

Automated System Recovery (ASR) is a feature of Windows Server 2003. It is used to perform a restore of the system state data and services in the event of a major system failure. An ASR restore includes the configuration information for devices. ASR backs up the system data and local system partition. It does not back up folders and files.

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Posted in A+, A+2006, MCDBA, MCP, MCSA, MCSA 2000, MCSA 2000 Messaging, MCSA 2000 Security, MCSA 2003 Messaging, MCSA 2003 Security, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003

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What are OSI and DoD models of network communications?

October 31st, 2009

The OSI Model

The International Organization for Standardization (ISO) developed the Open Systems Interconnection (OSI) reference model in 1977. The OSI model is a conceptual framework that can be used to get a better understanding of the complex interactions taking place among the various devices in a network. The purpose of the OSI model is to demonstrate how the network entities should work together for communication.

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Posted in A+, A+2006, CCENT, CCNA, MCSA, MCSA 2000, MCSE, Network+

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What is 802.11g?

October 28th, 2009

The 802.11g standard, defined by IEEE, is an extension to the 802.11b standard of wireless network. It operates in 2.4-GHz band and brings data rates up to 54Mbps using Orthogonal Frequency-Division Multiplexing (OFDM) technology. Since the 802.11g standard is backward compatible with 802.11b, an 802.11b device can interface directly with an 802.11g access point.

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Posted in A+, A+ 2009, A+2006, CCENT, CCNA, CCNA Wireless, MCITP, MCITP Consumer Support Technician, MCITP Enterprise Administrator, MCITP Enterprise Support Technician, MCITP Microsoft Windows Client, MCITP Microsoft Windows Server, MCP, MCSA, MCSA 2000, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003, MCTS, MCTS Windows Technology, MCTS Windows Vista, Network+

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What is SO-DIMM?

October 26th, 2009

Small Outline Dual Inline Memory Module (SO-DIMM) is a type of memory module that comes in 72 pins and 144 pins. The 72-pin SO-DIMM supports 32-bit transfers, and the 144-pin SO-DIMM supports 64-bit transfers. It was introduced for laptops. SO-DIMMs come in smaller packages, consume lesser power, but are more expensive than DIMMs.

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Posted in A+, A+ 2009, A+2006, MCSA, MCSA 2000, MCSE

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What is riser card?

October 26th, 2009

Riser card is a circuit board that is used to extend slots for expansion cards and provides the ability to connect additional expansion cards to the computer. These cards are used with LPX motherboards. With the introduction of ATX motherboards, riser cards are rarely used. In ATX motherboards, the expansion cards connect directly to the computer motherboard instead of using riser cards.

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Posted in A+, A+ 2009, A+2006, MCSA, MCSA 2000, MCSE

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What is startup phase in Windows XP?

October 9th, 2009

The Microsoft Windows XP startup phase involves the following steps:

  • Power-on self test (POST) phase
  • Initial startup phase
  • Boot loader phase
  • Detect and configure hardware phase
  • Kernel loading phase
  • Logon phase
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Posted in A+, A+ 2009, A+2006, MCSA, MCSA 2000, MCSE

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What is Loopback plug?

October 9th, 2009

Loopback plug is used to diagnose issues related to both parallel and serial ports to check whether or not they are working. It is plugged into a port and crossed over the transmission line to receive signals and send them back into the computer for testing.

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Posted in A+, A+2006, MCSA, MCSA 2000, MCSE

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What is the Last Known Good Configuration?

September 15th, 2009

The Last Known Good Configuration is an advanced boot option. It starts a Windows operating system by using the Registry information that was saved at the last successful logon. The configuration is stored in the HKLMSystemCurrentControlSet registry key. Although the Last Known Good Configuration option does not solve problems caused by corrupted or missing drivers or files, it enables a user to revert to the previous working state in case there are problems with the drivers. When a user opts for this boot option, he loses any modifications made since the last successful logon. A user can view this boot option by pressing the F8 key during the Windows XP boot process.

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Posted in A+, A+ 2009, A+2006, MCDST, MCITP, MCITP Consumer Support Technician, MCITP Enterprise Administrator, MCITP Enterprise Support Technician, MCITP Microsoft Windows Client, MCITP Microsoft Windows Server, MCP, MCSA, MCSA 2000, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003, MCTS, MCTS Windows Technology, MCTS Windows Vista

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What is the Roll Back Driver feature?

September 13th, 2009

Roll Back Driver is a feature of Device Manager that restores the previous device driver that was installed on a computer before the driver was updated. Windows supports driver rollback for all devices except printers. Rolling back a driver is available only on devices that have new drivers installed. When a driver is updated, the previous version is stored in the %system_root%system32
einstallbackups folder. Rolling back a driver uses this folder to revert to a previous version. A user should roll back a driver when he does not want to affect other system configurations or drivers and is assured that the current driver is causing problems.

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Posted in A+, A+2006, MCDST, MCITP, MCITP Consumer Support Technician, MCITP Enterprise Administrator, MCITP Enterprise Support Technician, MCITP Microsoft Windows Client, MCITP Microsoft Windows Server, MCP, MCSA, MCSA 2000, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003, MCTS, MCTS Windows Technology, MCTS Windows Vista

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What is the MSCONFIG utility?

September 11th, 2009

MSCONFIG is a command-line tool that opens the System Configuration Utility dialog box, which can be used to troubleshoot and resolve startup errors, resolve unwanted prompts by third party users, find and resolve problems with running services, and resolve the errors regarding boot paths configured on multi-boot computers. MSCONFIG.EXE helps a user to detect a specific file that is causing startup problems.

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Posted in A+, A+2006, MCDST, MCITP, MCITP Consumer Support Technician, MCITP Enterprise Administrator, MCITP Microsoft Windows Client, MCITP Microsoft Windows Server, MCITP Server Administrator, MCP, MCSA, MCSA 2000, MCSE, MCTS, MCTS Windows Server 2008, MCTS Windows Technology, MCTS Windows Vista

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