The ohm is the standard unit of resistance for direct current, and the standard unit of impedance for alternating current. According to Ohm's law, one ohm is the resistance between two points that requires one volt of potential difference to produce one ampere of current. In the process, one watt of energy is converted into heat. History of the Ohm The ohm was formally defined at an international conference in 1881, and is named after Georg Simon Ohm (1787 – 1854), a French physicist. The symbol is the Greek capital Read More

Social engineering is a fancy name for manipulating a person into giving you access to which you are not normally entitled.    This almost always involves lying about your identity or your intent. Here is a transcript of a class social engineering trick used to convice a user to divulge his password: [user] Hello? [hacker] Hi, this is Bob from IT Security. We’ve had a security breach on the system and we need every user to verify their username and password. [user] What do I need to do? [hacker] Let’s walk Read More

MSN Hotmail, an email service that the Microsoft Corporation provides, is Windows Live Hotmail’s predecessor. Hotmail, which was launched in 1996, is one of the most popular email services on the Internet today and is free to use. Windows Live Hotmail was subsequently launched in 2006 and has additional features such as unlimited storage, additional security, a calendar, contacts, and integration with Windows Live Messenger. Although Windows Live Hotmail is a Microsoft product, the application is not registered by default with the default programs tool in Windows Vista. This results Read More

Blender is a free, open source 3D creation and animation software. Blender uses powerful features and creative design options to allow users to create a wide variety of realistic art. While Blender is a free software, it is ranked among some of the most powerful 3D creation programs in the world and is used by home users and film makers alike to create everything from simple animations to full-length movies. Blender is a small program that can be downloaded to the user’s computer and is supported by all major operating Read More

Cisco Router IOS Cisco routers are manageable devices, which means that they have the Cisco IOS software for network and internetwork management. The Cisco’s IOS software delivers network services and enabled networked applications. The Cisco IOS is the CLI based software with which Cisco IOS commands can be executed. Cisco Commands There are more than 2,000 Cisco router commands in the latest Cisco router IOS software version including the basic router commands along with the advanced level router commands such as Cisco wireless router commands. The Cisco router IOS has Read More

Vulcanized rubber is a material that undergoes a chemical process known as vulcanization. This process involves mixing natural rubber with additives such as sulfur and other curatives. Vulcanization makes rubber much stronger, more flexible, and more resistant to heat and other environmental conditions. Vulcanized rubber makes both soft and hard objects, ranging from rubber bands to bowling balls. In fact, almost any rubber object consists of vulcanized rubber. How Vulcanized Rubber is Made It is necessary to use vulcanization to make commercial-grade rubber because natural rubber is not stable enough Read More

Since the launching of iTunes in 2001, it has grown to be one of the most downloaded and used multimedia applications on both the Windows and OS X Operating Systems (Oss). The program supports organization, storage, and playback of music, videos, and eBooks on computers, iPods, iPhones, and iPads. The iTunes application connects the user to the Apple store online to search and buy new files and music. As both the store and multimedia players get upgraded, the iTunes application will require updating to support the latest features and security Read More

The Windows Registry is a database designed to store options and various hardware and software configuration settings on MS Windows Operating Systems (OS's). Since the registry was first introduced in Windows 3.1, it has grown from storing COM-based component configuration information to management of settings for all of the programs installed on the computer. Today, the registry contains settings for the OS kernel, user interface preferences, device drivers, and other services in order to help the computer performance with as fast as possible. A common task for Windows computer users Read More

With Windows NT 4.0, came the launch of the System Policy Editor feature which enabled administrators to manage the security settings of the system through a single user interface. The System Policy Editor feature allowed administrators to easily manage configurations of multiple computers because configuration settings could be copied between systems. With the introduction of Windows 2000, the System Policy Editor feature was replaced by Active Directory Group Policy and security templates. Windows 2000, Windows XP, and Windows Server 2003 utilize Active Directory Group Policy and security templates to distribute Read More

Monitoring IIS Performance in Windows Server 2003 The primary performance monitoring MMC snap-ins and tools used for monitoring Windows Server 2003 and IIS are: System Monitor: The System Monitor is one of the main MMC snap-ins used to monitor system performance. This was previously the Performance Monitor tool in Windows NT. The name change to System Monitor occurred in Windows 2000. Through System Monitor, users can monitor various elements of the server’s performance, collect and view real-time data, or view historically collected data. System Monitor can be displayed in a Read More