A Virtual Private Network (VPN) is typically used by companies, schools, and other organizations when they want to allow remote access to their servers, printers, and other network devices without compromising security. A VPN therefore extends a private network across the internet, but protects this connection by encrypting it, thereby creating what many refer to as a tunnel through the public internet. VPNs have other uses though, such as securing your internet connection to protect your privacy and allow you to bypass censorship. Ideally, everyone should consider using a VPN, Read More

DWDM stands for Dense Wavelength Division Multiplexing. DWDM is a technology used to increase the capacity of fiber optics that results in faster transfers of data. What are fiber optics? Fiber optics are very thin and small fibers that are used to transmit data and light throughout a computer and network. How does DWDM affect fibers? The DWDM takes different signals and sends them at varying wavelengths simultaneously along a single fiber. This allows a fiber to increase its capacity and in effect makes it seem as if there are Read More

Warning: Unless deliberately changed, the keychain password is bound to the original administrator password. This originally provided single sign-on capabilities. Using the following method to reset one’s administrator password will require additional steps to also reset the keychain password. Please be advised that this may mean deleting any keychain protected with one’s original administrator password. For more information on resetting a keychain password, please refer to the FAQ entitled How do I reset a Mac OS X Keychain Password? Warning: Utilizing this method to reset one’s password could potentially disable Read More

Cable splicing tools are a fast and effective way to connect two wires or cables into one. Most cable splicing tools look like pliers; however others are more like scissors or utility knives. Here are some tips on how to best use these cable splicing tools: For Larger, Thicker Cables First, the type of splicing tool you will need depends upon the type of cable you would like to splice. Very tough cable sheaths usually require a plier-like splicing tool to cut deep into the sheath. Remember that your goal Read More

Usbehci.sys is a USB controller driver for Windows XP Service Pack 1. Usbehci.sys is a required file that manages USB ports and Plug-and-Play services. While Usbehci.sys should be included in any Windows Operating System installation, this file is often missing and may prevent the user from installing Windows XP properly. Usbehci.sys runs exclusively on the Windows Operating System and can be found in the Drivers subfolder of the primary hard drive’s System32 folder.   How Usbehci.sys Works Usbehci.sys is the software component that allows the computer to run its USB Read More

A superconductor is a substance which conducts an electric current with zero resistance. Superconduction is a phase state (like the liquid and solid states of the water); as such, it depends on the temperature among other variables. The temperature where the transition takes place is the critical temperature (Tc). In 1911, H. Kammerlingh Onnes discovered superconductivity working over mercury. Superconductors are classified as Type I or Type II depending on their transition behavior. In Type I, resistance falls to zero abruptly when Tc is achieved; Type II superconductors hold a Read More

Fusion power refers to energy produced during the fusion of two different atoms. The same process occurs in space; its' this process that gives the starts their brightness. It is also the sun's source of heat. The hydrogen bomb also works in the same way but in an uncontrolled manner. In a nuclear fusion process, energy could be released once two or more elements with light atomic numbers are induced to fuse together. The elements that are usually used are deuterium, tritium and hydrogen. The whole process begins when two Read More

A network printer that is connected to a router or modem and uses either an Ethernet port or wireless adapter can be located via any computer within the same network. A user can find a printer on his/her network by clicking on the Start Menu and selecting the Control Panel. From here, the user must find and select the “Printers and Faxes” icon. This window should display all printers, scanners, and fax machines that are connected to the network. To locate the printer’s IP address, the user should right click Read More

When executing an inter-network installation, many mechanisms and components are usually involved. Cisco is superior because it is the only inter-networking company with a well made end to end inter-networking solution. Cisco switches makes the LAN more competent by creating multiple collision domains. Each switch port is a split collision domain. With only one device connected per port, collisions are not probable and communications are more efficient. Cisco switches are very capable because they perform packet filtering and forwarding in hardware as opposed to software. Cisco switches increase the speed Read More

A laptop is a essentially a personal computer with a slim form factor and a battery, which makes it possible to carry it around and use it on the go, even when you don’t have a power outlet near you. Traditionally, its slim form factor meant certain hardware limitations because of space constraints and heat issues. In simple terms, less can be fit into them, and they tend to produce more heat. Advances in technology have largely reduced these limitations with the advent of ever more powerful chips with ever Read More