Wireless Fidelity

WiFi stands for Wireless Fidelity. WiFi is a wireless work tekologi that uses high frequency electromagnetic waves to transmit data. Frequency used by WiFi technology is at 2.3 GHz spectrum. By using WiFi, you can access the Internet quickly. WiFi has the ability to access the internet up to 11 Mbps or five times faster than the Internet access using 3G. Because the use of wireless, Wi-Fi technology utilized on a suitable location or runagan always be changed zoom. So that we can be the connected computer to the Internet using Wi-Fi, our computer must be equipped with a WiFi card or have support WiFi technology. Then we we are at locations where available WiFi signal or hotspot is often referred to as points or dots. Nowadays there are plenty of public places that has been providing services access internet connection using WiFi.
There are three components contained in a hotspot location, among others, is as follows:
1 Access Point (Access Point) is a device that connects to an Ethernet LAN Wireless technologies contained in the computer. The access point has to serve users as much as 128 people. The area can be reached by an access point to reach 25-100 meters.
2 Access Controller (access control) is a device that serves as a means of authentication, check whether a user is a person who has the right or permission to access.
3 Internet Link is a device that connects to the internet hotspot locations. Internet links have the ability to speed up internet connection of 512 kbps. Connection capability is used to serve all the users in one location.
The downside of internet access with WiFi access is only done at Dapa derah points as far as 100 meters from the point. And to date, only certain places are already installed point point. Certain places are usually a campus, hotels, cafes, airports, and other public places. Nowadays there are a lot of malls, cafes, hotels that provide internet access using WiFi for free. This is then used by many people for accessing the internet while hanging out with friends. Another drawback with internet access via WiFi is the issue of data security. Although the encrypted (encoded), the data submitted by over a data network easily penetrated.
wireless Broadband
Wi-Fi technology allows us to access the Internet at high speed. However, the condition we need to be in areas accessible WiFi signal. Limited area with WiFi signal and distance range of a WiFi signal is very short (about 100m) cause we can only use WiFi in certain areas only. Currently a new wireless technology being developed is called the Wireless Broadband (WiBro). However, this technology is still in the development stage and only used in a few countries and has not been marketed in Indonesia. Compared with WiFi, WiBro can be accessed from a distance of 1 kilometer from the point of access points with speed of 512 kbps. WiBro access can still be done from a moving vehicle at speeds up to 60 km / h.
3G 3G services can be obtained via the GSM and CDMA operators. In the GSM operators, 3G using WCDMA technology. The technologies of an evolution of GSM technology which then developed into GPRS. Later developed into GPRS EDGE (Enhanced Data rates for GSM Evolution) and WCDMA eventually become (3). While the CMA operator, 3G using EDV technology (Evolution Data Optimized). Technology is an evolution of the IS95 20001X (2.5G) developed into CDMA20001X EVDO (3G) and then became CDMA20001X EVDV (3G). The advantages of internet access using 3G, other than wide bandwidth, can also be supported with HSDPA (High Speed ​​Downlink Packet Access). The technology allows Internet access at 2.6 Mbps or 40 times faster than Internet access by dial-up. The downside of the 3G technology is that we can only use limited to local outreach service provider. Far is the reach of 3G services is still very limited. 3G service operators, such as Indosat, Telkomsel and XL could bring new services in major cities in Indonesia alone and still dominated in Java. The 3G service operators still have to think twice to develop the service to other areas of its potentially small, because the investment costs incurred to build a huge infrastructure. This means derah other areas will still be a long reach by 3G services.        The other drawback if you want to use the internet to access 3G services is the device used. If we want to access the internet using 3G services, we must have a cell phone equipped with 3G technology. whereas, a 3G mobile phone technology is still expensive. 3G network is not an upgrade from 2G; 2G operators affiliated with 3GPP need to replace a lot of components to be able to provide 3G services. While 2G operators affiliated with 3GPP2 technologies easier to upgrade to 3G because of its wide range of network elements in the direction it was designed for broadband wireless services (wireless broadband).