Cellular PhreakingCellular Phreaking The cellular/mobile phone system is one that is perfectly set up to be exploited by phreaks with the proper knowledge and equipment. Thanks to deregulation, the regional BOC's (Bell Operating Companies) are scattered and do not communicate much with each other. Phreaks can take advantage of this by pretending to be mobile phone customers whose home base is a city served by a different BOC, known as a roamer. Since it is impractical for each BOC to keep track of the custome
Hexadecimal NotationHexadecimal Notation Ninety-nine percent of the data you see in the registry is hexadecimal. Computers use hexadecimal notation instead of decimal for a good reason, which you'll learn in a bit. You must learn how to read and convert hexadecimal numbers to use the registry as an effective tool. And that's the point of this section. Binary and decimal notations don't get along well. You learned decimal notation as a child. In this notation, 734 is 7 x 102 + 3 x 101 + 4 x 100, which is 7 x 100 + 3
The Internet How it Works and How it Effects the WorldThe Internet: How it Works and How it Effects the World Many people do not understand what the Internet is the power that it has over the world. The Internet is an extraordinary learning and entertainment tool that, when used properly, can significantly enhance a user's ability to gather information. Advanced Research Projects Agency Network (ARPANET) started the Internet. It was a project under taken by the Department Of Defense (DOD) in 1969. It started as an experiment to link together DOD an
Hypertext Markup LanguageHypertext Markup Language There are two common ways to setup the text of your home page. You can use the Hn command where n is any number ranging from 1 to 6 (1 creating the biggest text heading and 6 the smallest). Some examples are shown below. This is heading size 1, the largest. This is heading size 3. This is heading size 6, the smallest. Here's the code used. H1 This is heading size 1, the largest. /H1 H3 This is heading size 3. /H3 H6 This is heading size 6, the smallest. /H6 Looks good r
Floating Point CoprocessorsFloating Point Coprocessors The designer of any microprocessor would like to extend its instruction set almost infinitely but is limited by the quantity of silicon available (not to mention the problems of testability and complexity). Consequently, a real microprocessor represents a compromise between what is desirable and what is acceptable to the majority of the chip's users. For example, the 68020 microprocessor is not optimized for calculations that require a large volume of scientific (i.e.
The Science Behind Web Colors The Science Behind Web Colors The Science Behind Web Colors: The technological advancements of the late twentieth century has introduced artists to a new type of medium, the web. Beneath the Web’s complex jumble of hyperlinks, documents, and multimedia offerings lies a programming language that keeps all the content in its place. Without this ubiquitous, yet often unseen HTML code to hold the Web together, the medium itself could not exist, and cyberspace would be a vastly different experience