Simple Mail Transfer Protocol (SMTP) Service Overview The Simple Mail Transfer Protocol (SMTP) service, a primary service included as part of IIS, performs the key functions and has the characteristics listed below: SMTP can be used to forward mail from one SMTP host to another. SMTP cannot deliver mail directly to the client. Mail clients use POP3 or IMAP to receive e-mail. Windows Server 2003 includes the POP3 service for providing clients with mailboxes and for handling incoming e-mail. It enables IIS machines to operate as SMTP hosts to forward Read More

Cryptography is very difficult. It is even more difficult to tell if you have done it correctly. If you design and implement your own cryptographic algorithm, the odds are that you will fail to create a secure system. It is much better to code your application to use an existing cryptographic library which has been tested with extensive peer review. Adam Shostack maintains a good list of cryptographic libraries at Source Available Cryptographic Libraries. PCL is an interesting cryptanalysis library with functions for dictionary attacks and brute force attacks.  

GPS stands for Global Positioning System. It is used by individuals, commercial entities and the military for navigational purposes. GPS uses 24 satellites that orbit the earth and send radio signals. The GPS satellites work with a GPS receiver which today can be found in individual handheld units, car navigational systems, boat navigational systems, highly precise commercial products and a wide range of military equipment. Operation of GPS GPS operates using triangulation. Triangulation is a method in which three separate points are measured to calculate location. For instance, in a Read More

Over the past several years, the popularity of MP4 formatted music and video files has continued to increase. All iDevices to include the iPhone, iPad, and iPod support playback of the MP4 format as well as the Sony Playstation Portable. As a result, a common task that arises for consumers is converting legacy MP3 formatting music to MP4. Once a music track is converted, it can then be used on any device supporting the MP4 format. Steps to Convert MP3 to MP4 With iTunes Step 1– Download, install, and launch Read More

When someone receives the Windows error, “This device cannot start. Code 10 in audio driver,” it means that he/she has a bad, missing, or incompatible driver for his/her sound card. The very technical and confusing explanation for this message, according to Microsoft, is this: “If the device has a FailReasonString value in its hardware key, that string appears as the error message. The driver or enumerator puts this registry string value there. If there is no FailReasonString in the hardware key, you receive the following error message: This device cannot Read More

The new version of Internet Explorer has a feature built in known as Favorites Center. This controls the favorites of the web browser, but then incorporates other features such as a RSS feed and then your recent history. All of these components, when combined together, make for an exceptional Favorites Center. Making it work to your liking, though, can be a little bit tricky. Internet Explorer Favorites The first feature that is obvious for a favorites center is the section of favorites. These are all the web pages that you've Read More

SERPs are “Search Engine Result Pages” If a search engine user types in a search for “rubber baby buggy bumpers” and your web site is the first result, then you can be said to have the #1 SERP for “rubber baby buggy bumpers.” The whole purpose of Search Engine Optimization (SEO) is cause web pages to rank highly in the SERPS. The higher your web pages rank in the SERPS for their chosen keywords, the more traffic your web site will receive. Tracking SERPs Check How can I track my Read More

Viewing one’s house via a satellite is very easy now with programs such as MapQuest.com and Maps.Google.com. Both of these websites provide a user the chance to type in their address and then zoom in on the house with an aerial view taken by a satellite. Google Maps can zoom in a bit more than MapQuest, but they both allow for someone to view their own house. To begin with, open up either MapQuest or Google Maps. The choice is entirely yours. Once the site has loaded, begin to punch Read More

A Butterworth filter is a signal processing filter that has an extremely flat frequency response in the passband. It is referred to as a maximally flat magnitude filter and is commonly used in both analog and digital audio crossover filters in home, commercial, and car stereo systems. Who Invented the Butterworth Filter? British engineer, Stephen Butterworth developed a reputation for being able to solve extremely difficult if not impossible mathematical problems. When Butterworth was conducting his research, most filter designs were a result of trial and error due to the Read More

HTTP Error 404 is an error message which means that the web page you are looking for cannot be found. The 404 error is also known as “File not found”, “Not Found” and “Gone”. The Official Definition of 404 Quoting from RFC 2616 – Hypertext Transfer Protocol — HTTP/1.1: 404 Not Found The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, Read More