About Modem

Modem, an acronym for modulator/demodulator, is a device that allows one computer to "talk" with another one over a standard telephone line. Modems act as a kind of interpreter between a computer and the telephone line. Computers transmit digital data, expressed as electrical impulses, whereas telephones transmit voice frequencies as analog signals. To transmit digital data, the sending modem must first modulate, or encode, a computer's digital signal into an analog signal that can travel over the phone line. The receiving modem must then demodulate, or decode, the analog signal back into a digital signal recognizable to a computer. A modem transmits data in bits per second (bps), with the fastest modems transmitting at 56K (kilobits per second). An internal modem is housed within the computer itself, while an external modern is a separate device that is connected to the computer via a cable.

A variety of different rules, called protocols, govern the conversion of data to and from digital and analog. These protocols also govern error correction and data compression. Error correction is necessary to detect and correct data that may have become lost or garbled as the result of a poor telephone connection. Data compression speeds the data transfer by eliminating any redundant data sent between two modems, which the receiving modem then restores to its original form. Individual modems vary in the types of protocols they support, depending on such factors as manufacturer and age.

Edit Registry

For a thin bag or even not have pockets, can apply this way. From the purchase security tools that cost was not a student bgt. This paper is taken from the blog mas Rudi (ditampilin ride here ya mas), and there is also a book that discusses the windows registry. Read up abis or Save Page As ... .. IMPORTANT NOTE!:    1. Registry is the determinant of the workings of the Windows XP operating system, therefore utak-tweaking the registry means to tamper with the workings of your Windows XP.    2. In order to avoid trouble, before fiddling with the Registry, there is a good idea to backup first.