VPN, or a Virtual Private Network, connects computers and other devices using an encrypted connection. This means that all data travelling through such a network is unreadable to anyone who might intercept the data stream, making it as private as it would be if all of the connected devices resided within the walls of a private property (like your home). In other words if you connect your computer to a VPN, and route all of your online activity through it, this activity can no longer be tracked by your internet Read More

C Band is the original frequency allocation for communications satellites. C-Band uses 3.7-4.2GHz for downlink and 5.925-6.425Ghz for uplink. The lower frequencies that C Band uses perform better under adverse weather conditions than the Ku band or Ka band frequencies. C Band Variants Slight C Band frequency variations are approved for use in various parts of the world. Band TX Frequency RX Frequency Extended C Band 5.850 – 6.425 GHz 3.625 – 4.200 GHz Super Extended C-Band 5.850 – 6.725 GHz 3.400 – 4.200 GHz INSAT C-Band 6.725 – 7.025 Read More

H.323 is an ITU standard multimedia conferencing protocol, which includes voice, video, and data conferencing, for use over packet-switched networks. H.323 was the first standard for VoIP, but is being supplanted by SIP. H.323 defines five components of a multimedia network: Terminals Multipoint Control Units (MCUs) Gateways Gatekeeper Border Elements Terminals are telephone and PC equipment which connect end-users to the H.323 network. MCUs are responsible for managing conferences. MCU’s consist of a Multipoint Controller (MC) and an optional Multipoint Processor (MP). The MC manages signaling and the MP manages Read More

A DiSEqC (Digital Satellite Equipment Control) switch is a device that connects coaxial cables from a satellite receiver to coaxial cables from a satellite antenna and is responsible for transferring data and power to and from each device. DiSEqC switches are used to control a satellite dish’s direction, send power from a satellite receiver to the oscillator in a satellite dish, and send data that a satellite dish collects to the satellite receiver. In the case of account related applications such as Pay-Per-View services, a DiSEqC switch can also be Read More

Wireless networks are those computer networks that use electromagnetic waves instead of wires in order to carry signals over the various parts of the network. Wireless networks which run over other wireless networks often utilize the lower layer networks to provide security and encryption. Stand-alone wireless networks either provide their own security and encryption features or rely upon VPNs (Virtual Private Networks) to provide those features. In many cases, multiple layers of security and encryption may be desirable. Need for Wireless Networks and their Benefits Wireless networks belong to the Read More

ActiveX is a software structure created by Microsoft. It contains re-deployable software modules known as controls which are utilized to perform a unique function or set of functions within the confines of Microsoft Windows. These controls can be brought together to work as a complete software application itself. ActiveX controls are based on the Component Object Model (COM) and Object Linking and Embedding (OLE). They are similar to Java applets, except that ActiveX controls work exclusively with Microsoft Internet Explorer and the Windows operating system. ActiveX offers a greater level Read More

Anyone who would like to see his/her house from outer space is in luck. There are a variety of options available that allow any structure on earth to be seen from space. There are a few things to understand about viewing a home from space before attempting to do so: Images – The images displayed will not be live. They will be outdated satellite images that have been archived and made available through the chosen source. Location – Not all sources will have every location available through their satellite imagery Read More

Preparing for the BizTalk Server Installation There are a number of components that have to be installed or created as part of the preparation process for installing BizTalk Server. How to install Internet Information Services (IIS) Open Control Panel. Double-click Add/Remove Programs. Click Add/Remove Windows Components in the Add Or Remove Programs dialog box. The Windows Components Wizard initiates. In the Components list, select the Internet Information Services (IIS) checkbox and then click Next. Click Finish. How to disable the IIS Authoring Option Open the Internet Services Manager. Expand the Read More

Strain gauges measure the amount of stress or strain placed on an object. Arthur C. Ruge and Edward E. Simmons invented them in 1938. The most common type of strain gauge in use today consists of an insulating, flexible backing that supports a metallic foil pattern. The gauge is placed on the object with an adhesive. As the object comes under strain or gets deformed, the foil deforms and causes the electrical resistance to change. The change in resistance is then measured with a Wheatstone bridge. How does a Strain Read More

Clearing previous Google searches is a straight forward process that can take about one minute to accomplish. It should be noted that unless you’re using the Google toolbar, erasing only the history of Google is impossible. However, since people typically only use one search engine predominately, erasing the search history will only affect Google. Erasing Search History in Internet Explorer To erase the history, look for the tools tab. Depending on what version of IE being used, one can determine where the tools tab is located. Click the tools tab Read More