BLOGGER TEMPLATES AND TWITTER BACKGROUNDS »

Rabu, 29 September 2010

about internet ..

To be able to access the internet, there are several kinds of the most important hardware to be used, among others: 
Computer


Computers are a major component to be mengkases Internet. Computer specifications used in the Internet connection is fast or slow performance to determine Internet access. the higher specification of a computer, internet access faster performance, and vice versa.
Minimum specifications of a computer in internet access among others the following:1. Processor, the brains of the computer to run applications in a computer. Minimum Pentium III processor or equivalent with it.



2. RAM (Random Access Memory), serves as a temporary storage media. 256MB RAM minimum.


3. Hard disk drives, used for magnetic data storage media. At least 20GB hard drive.



4. VGA card, a hardware device to display images on the monitor screen. At least 4MB of VGA card.


vga-card
5. Monitor, an output device to display the work process of the computer.
monitor

2. Modem (Modulator Demodulator)

External Modem


External Modem
Modem acronym derived from modulator demodulator. Modulator is a part that converts the signal information into the carrier signal (Carrier) and ready for delivery, while the Demodulator is the part that separates the information signal (which contain data or messages) of the signal (carrier) that accepted so that the information can be well received. Modem is the combination of both, it means the modem is a two-way communication tool.
In short, the modem is a tool to convert digital signals into analog signals your computer and vice versa. Computers that connect to the internet connected to telephone lines via modem. Based on the modem functions are divided into three types. Among others:
1. Modem Dial UpDial Up Modem commonly used by the Personal Computer (PC) is directly connected via telephone lines. Type of dial up modems have two types, namely:1. Internal ModemModem is installed in the computer, especially on the available expansion slot in your computer mainboard. Average speed of the internal modem to download is 56 Kbps.
The advantage of internal modems use1. More efficient place and a more economical price.2. Does not require an adapter so impressed a lot more concise without cables.Weakness of internal modem1. This modem does not require the indicator light so it is difficult to monitor modem status.2. This modem does not use the voltage source itself and thus require power from the power supply. This caused the temperature in the CPU box to get hot.2. External Modem
External modem is a modem that is located outside of the computer CPU. External modem connected to a computer via com port or USB. Installation of this modem by connecting the modem to the power adapter and connect it again then reconnected to the mains.
Gain an external modem:1. Portability is good enough so that it can move around to use on another computer2. Equipped with indicator lights making it easy to monitor the status of the modem.The weakness of the modemexternal1. The price is more expensive than the internal modem2. Requires a separate place or location to put the modem.2. Cable Modem
Cable Modems (Cable Modem), is the hardware that connect your PC with a cable TV connection. This cable TV network can be used to connect to the Internet at speeds higher than dialup modem or ADSL modem, cable modem speed of maximum 27Mbps downstream (to the user's download speed) and 2.5 Mbps upstream (upload speed of the user). Before you can connect to the internet, then the user is required to perform registration service provider for cable TV and ISP (Internet Service Provider).3. Modem ADSL (Asymmetric Digital Subscriber Line). (Net / gem)