Active Directory

Active Directory is a network-based object store and service that locates and manages resources, and makes these resources available to authorized users and groups. An underlying principle of the Active Directory is that everything is considered an object?people, servers, workstations, printers, documents, and devices. Each object has certain attributes and its own security access control list (ACL).

What is Global Catalog?

The Global Catalog authenticates network user logons and fields inquiries about objects across a forest or tree. Every domain has at least one GC that is hosted on a domain controller. In Windows 2000, there was typically one GC on every site in order to prevent user logon failures across the network.

What types of classes exist in Windows Server 2003 Active Directory?

Structural class:
The structural class is important to the system administrator in that it is the only type from which new Active Directory objects are created. Structural classes are developed from either the modification of an existing structural type or the use of one or more abstract classes.
 

Read more »

What is cache memory?

Cache memory is random access memory (RAM) that a computer microprocessor can access more quickly than it can access regular RAM. As the microprocessor processes data, it looks first in the cache memory and if it finds the data there (from a previous reading of data), it does not have to do the more time-consuming reading of data from larger memory.

What is the difference between Unix and Windows?

Unix and Windows use completely different paradigms for run-time loading of code. Before you try to build a module that can be dynamically loaded, be aware of how your system works.

In Unix, a shared object (.so) file contains code to be used by the program, and also the names of functions and data that it expects to find in the program. When the file is joined to the program, all references to those functions and data in the file's code are changed to point to the actual locations in the program where the functions and data are placed in memory. This is basically a link operation.

Read more »

What is Backup Storage and the types of backup.

In computers, backup storage is storage that is intended as a copy of the storage that is actively in use so that, if the storage medium such as a HDD (Hard Disk) fails and data is lost on that medium, it can be recovered from the copy. In an enterprise, because the loss of business data can be a big problem differences, it is important that backup storage be provided.

On a personal computer, backup storage is commonly achieved with Zip drivers and DVDs or Store it in a local system itself. In an enterprise, backup storage can sometimes be achieved through replication of data in multidisc storage systems, such as RAID; as part of network-attached storage (NAS); as part of a storage area network SAN. Enterprise backup storage often makes use of both disk and tape as storage media. Special software is used to manage backup as part of a storage system.

Types of Backups:

Read more »

What we can do if system was infected by Virus

"The only way to absolutely, positively clean a machine from a virus is to completely reformat the machine and reinstall the operating system, updates, applications and data from scratch."

It's simple really: consider the possibilities after you're infected with a virus:


1. Your anti-virus program successfully cleans it off.

2. Your anti-virus program thinks it successfully cleans it off, but in fact the virus has hidden itself so well that it remains. You're still infected, and you don't know it.

3. Your anti-virus program doesn't catch it and doesn't even try to clean it off. You're still infected, and you don't know it.

4. Your anti-virus program fails to clean it off and tells you. You're still infected, but at least you know.

Not Satisfied with the above , please try below steps and check:

Read more »

how to protect my system from Virus..

Viruses are not the only forms of malicious code that may invade your system. Worms, Trojans, adware, spyware, key loggers together with viruses form part of malware running in the wild that may seriously harm your system and your data while also hogging system resources, reducing PC performance and Internet bandwidth. Here are seven ways of protecting yourself against malware.


Today, security threats come in all shapes and sizes and from a variety of sources including software downloads, peer-to-peer networks (e.g., Kazaa), floppies, CD or DVDs, emails and their attachments, chat rooms, your colleagues on the network and the Internet in general.

Few ways to protect your system from Viruses.

Read more »

Tips for a secure password

What do online social networks, online banking and email accounts have in common? They all require passwords.

These passwords act like sentinels, keeping snoops and data pirates away from one's personal data. But bad passwords are as easy to crack as cheap locks. That means one can't be careful enough when picking a password.

“A good password should include a lot of the different options available on most keyboards,” says Lutz Neugebauer of Bitkom, a German technology industry association.

Read more »

Upgrade to Fedora 13

Fedora is a Linux-based operating system that showcases the latest in free and open source software. Fedora is always free for anyone to use, modify, and distribute. It is built by people across the globe who work together as a community: the Fedora Project. The Fedora Project is open and anyone is welcome to join. The Fedora Project is out front for you, leading the advancement of free, open software and content.

 Fedora 13 is right around the corner. Code-named "Goddard," the Fedora 13 release sports tons of updates from Fedora 12 and some really exciting new features that will have Linux power users running for their CD burners. You'll find everything from better printer support to experimental 3D support for Nvidia cards and filesystem rollback. Ready to roll up your sleeves? Let's take a look at the best of Fedora 13.

Read more »

How to troubleshooting blue screen (BSOD) errors ?

First , before troubleshooting blue screen you should enable a complete memory dump on your system after Windows Installation. This is done under the system properties in Startup and Recovery. It's best to do this right after you install Windows, before you start getting any BSODs. Sometimes the blue screen will show the name of the driver that is causing the problem. If nothing else, you can look up the STOP code and see what the problem is.

The most important info to record from the blue screen is the technical info, it will look something like this:

*** STOP: 0x0000007B (0x00000032, 0x00002345, 0xABCDEF00, 0x00000000)

Read more »

RJ45 Patch Cable Configuration

RJ45 Patch Cable Configuration EIA/TIA 568A Colour Scheme  Colour  1. White-Green 2. Green 3. White-Orange 4. Blue 5. White-Blue 6. Orange 7. White-Brown 8. Brown

Read more »

Installing Samba on Linux

1. Start the Service of Samba

2. Configure Samba:

      a). Samba is controlled by means of the configuration file /etc/samba and edit smb.conf

Create a basic configuration file containing the following lines:

Read more »

Ten Reasons to Upgrade to Windows 7

1. Aero Peak : To quickly peer past all open windows to look straight at the Windows 7 desktop, simply point to the right edge of the taskbar. All open windows will instantly turn transparent, making it possible to see what's on the desktop.
2. Redesigned Taskbar : With Windows 7, getting an application icon onto the taskbar is as simple as right-clicking on the icon and selecting "Pin to Taskbar." Voila, it magically appears on the Taskbar.
3. Aero Snap: With just about every laptop being sold now having a widescreen display, have you ever needed to position two documents side-by-side? Rather than tearing your hair out in frustration, Aero Snap offers a quick and easy way to "snap" windows into the left or right half of your screen simply by dragging Windows to the edges. (You can also snap windows vertically.)

Read more »

Plan your Windows 7 migration

Are you thinking about migrating to Windows 7? It’s not hard, but due diligence and good planning are paramount for a successful migration. You need to follow best practices, which includes tapping into Microsoft’s readily available — mostly free — tools and resources

Seven tips will tell you everything you need to know for a smooth transition to Windows 7

1. Determine which of your existing PCs will support Windows 7

2. Determine which of your applications will run under Windows 7

3. Decide which version of Windows 7 is right for you

4. Assess the tasks involved and how you’ll manage the migration

5. Perform a test run with a pilot group

6. Migrate in stages

7. Train your employees

http://technet.microsoft.com/en-us/library/dd560772(WS.10).aspx

What You Should Know Before Buying a New Laptop

5 Questions to Ask Yourself Before Buying a New Laptop

Shopping for a new laptop computer can be a very daunting task for new shoppers and previous laptop owners alike. Follow this five question jog-list to choose which laptop features, models, brands or price is right for the new laptop of your dreams.

1. What's will you do with your laptop?

2. Do you travel a lot or will you be homebound?

3. What's your budget?

4. What are others saying?

5. Who has the best price?

Read more »

Intel WiDi Wireless Display Technology - HOT

Intel's new WiDi (Wireless Display Interface) technology will start to be bundled with various Core i5 and Core i3 notebooks and it promises to address the Home Theater and Multimedia PC markets with a solution that will enable wireless connectivity of your notebook over HDMI to an HDTV. Using standard 802.11n wireless technologies for transmission of data, Intel describes the product as "a solution that requires a laptop PC based on select 2010 Intel Core processors, Intel HD Graphics, and Intel Centrino wireless with Intel MyWiFi Technology enabled. The laptop needs to have Intel Wireless Display software installed and also an adapter featuring Intel Wireless Display is required to receive the signals from the PC that display them on the TV. This adapter is connected to the TV via either HDMI or standard AV cables." 

Netgear has stepped out early with a receiver product dubbed Push2TV and their block diagram below lays out the solution for you here... 

System Requirement:

Windows 7 Minimum System Requirements

1 GHz or faster 32-bit (x86) or 64-bit (x64) processor

1 GB of RAM (32-bit) / 2 GB RAM (64-bit)

16 GB available disk space (32-bit) / 20 GB (64-bit)

Direct X 9 graphics processor with WDDM 1.0 or higher driver

DVD-compatible drive

Note: Some product features of Windows 7, such as the ability to watch and record live TV, BitLocker, or navigation through the use of “touch,” may require advanced or additional hardware. Windows XP Mode requires an additional 1 GB of RAM and 15 GB of available disk space.

Could Windows Vistas Pretty Looks Be To Blame For It Running So Slow?

If you have switched over from XP to Vista you surly will have known by now that Vista is much slower. This lack of speed has to do with Vista dedicating a lot of its resources to trying to “look pretty”. Making the operating system look nice is great and all but when it comes time to actually get some work done it can be a huge problem. In this article I am going to show you two quick ways to make your Vista perform a it faster but you are going to have to be willing to sacrifice some of Vistas looks in order to get more function. Keep in mind that there really is no point in having your computer look really nice since you are the only person that is really going to be seeing it.

If you are using the Home Premium, Enterprise, Business or Ultimate more likely than not you have the Aero effect turned on. This effect is designed to make your computers windows have a glass like effect that looks cool. It also allows you to have Windows Flip 3D which is just a fancy version of the Alt + Tab combination which allows you to cycle through your currently opened programs. If your not sure what the Flip 3D is, just open a few programs, hold down the Windows Button and press the Tab key a few times – that’s Windows Flip 3D. Now hold down the Alt key and press the Tab key a few times – that’s the old way of cycling through your programs. Here’s how to get rid of the Aero effect:

Read more »

Why Cleaning Up After Windows Can Make Your Slow Computer Faster

So your computer’s slow and you have no clue where to start to make it faster? Try cleaning up your Temp folder. Your computer’s operating system is designed to run as quickly as possible but after time it will start to slow down (don’t worry this is natural). Why does this happen? See when your first get your computer it is completely “clean”. Then after you have used it for a while what happens is that it will start to slow down since it starts to accumulate “junk” in different areas of the computers operating system.

All you really have to do is to just go in there and clean up all of that junk – yes it’s that simple (well for the most part, you do also have to know how to tune your computer but that’s more in depth and beyond this article). This is why the idea of registry cleaners is so attractive – it cleans one area of your computer (your registry) to make it faster – but the big problem with registry cleaners is that they only clean one area while there are many different areas that need to be worked on to make your computer faster.

Read more »