802.11b is the standard that is popularly used for high speed wireless networks. The standard is set by IEEE (Institute of Electrical and Electronics Engineers) and uses a 2.4 gigahertz radio frequency. There are several standards that are in use today for wireless communication from one computer device to another; however 802.11b is cost effective, quick and easy to use. For many people, building a wifi network is easier than ever thanks to 802.11b. This technology usually includes a wireless router that is able to send radio signals using 802.11b Read More

720p is a shorthand name used to describe one of the HDTV formats. In other words, 720p is a 1280×720 resolution. The p stands for progressive which is better than i which stands for interlaced. 720p and the other HDTV formats becomes important when trying to determine what kind of a television to get and, more importantly, how big to get the television. What is 720p? The 720 describes the number of lines that go across the screen horizontally to create the image. Therefore, if there are 720 lines, the Read More

Quite a few free DVD burning software packages are available. Here are a few: CDBurnerXP Pro CDBurnerXP Pro is very limited when it comes to writing to DVDs. Audio CDs are the program’s specialty. Although CDBurnerXP Pro produces superb quality, it leaves no time delays in between songs. CDBurnerXP Pro supports CD-R/RW, DVD+R/RW, and DVD-R/RW discs. This program is very customizable and equipped with numerous features. CDBurnerXP Pro can burn and write ISO files. Supported Platform(s): Windows 98/ME/2000/2003/XP DeepBurner Free Version DeepBurner comes in two versions, Pro and Free. DeepBurner Read More

Google Chrome extensions are programs that add useful features and extend a browser’s functionality. To browse available extensions: 1) Visit chrome.google.com/webstore and click Extensions on the left side menu. 2) Browse through the entire gallery or place the cursor over Extensions in order to see a drop down menu of categories like “Sports” or “News and Weather.” 3) In order to search for a particular extension, type keywords into the “Search the store” search box. 4) Click an extension to view its description. The pop up window will offer a Read More

The symbol rate is the rate of state changes on a communications circuit. If a circuit can carry two tones per second, the circuit has a symbol rate of two. Circuits then use different modulation techniques to carry multiple bits per symbol. If the circuit is limited to two different tones, the first tone can represent a 0 and the second tone can represent a 1. In this circuit, the symbol rate is the same as the bit rate. If the circuit can carry four different tones, then the tones Read More

Certificate Authority or Certification Authority (CA) is an entity, which is core to many PKI (Public Key Infrastructure) schemes, whose purpose is to issue digital certificates to use by other parties. It exemplifies a trusted third party. Some certification authorities may charge a fee for their service while some other CAs are free. It is also not uncommon for government and institutions to have their own CAs. More about Issuing a Certificate The certification authority issues a Public Key Certificate (PKC), which attests that the public key embedded in it Read More

The speed of light in MPH is 670,616,629 mph, 299,792,458 meters per second, or 186, 282 miles per second. Light takes approximately one second to travel the 238,854 miles to the moon. The speed of light is considered a physical constant that is used in many areas of physics. This is because light always travels at this speed in space or in a vacuum regardless of the measurement source or observer. The most popular use of the speed of light is in Albert Einstein’s theory of relativity, E=mc^2, where c Read More

  Remote Access Overview Dial-up networking allows a remote access client to establish a dial-up connection to a port on a remote access server. The configuration of the DUN server determines what resources the remote user can access. Users that connect through a DUN server, connect to the network much like a standard LAN user accessing resources. Virtual Private Networks (VPNs) provide secure and advanced connections through a non-secure network by providing data privacy. Private data is secure in a public environment. Remote access VPNs provides a common environment where Read More

In many homes in the developed world, the number of computers and portable media players capable of playback of MP4 content outnumbers the people who actually live in the home. As a result, many consumers have the need arise to convert videos to MP4 to playback on their iPad, iPod, or personal computer. Unfortunately, the process to convert videos is not yet streamlined or made “consumer-proof” to make this an easy process. There are a variety of options available to the end-user to perform this task based on the source Read More

Electromotive force is the electrical potential energy that causes current to flow through a circuit. It results from the difference in charge between two points in a material. This difference is created when an external source such as a battery makes electrons move to both points so that there is an excess at the first point and a deficiency at the other. The volt is the unit that describes the energy that the source of electric power supplies that drives the unit charge within or around the circuit. Electromotive force Read More