(Wireless Fidelity) is a wireless connection such as mobile phones using radio technology allowing users to transfer data quickly and securely. Wi-Fi not only be used to access the Internet, Wi-Fi can also be used to create wireless networks in the company. Therefore, many people associate with Wi-Fi "Freedom" for Wi-Fi technology gives the user the freedom to access the Internet or transfer data from the meeting room, hotel rooms, campus, and café-café that marked Wi-Fi Hot Spot. Also one of the advantages of Wi-Fi is practical, not have to bother installing network cable. For the problem depends on the speed of the signal obtained.
Wi-Fi service offered by each Hot Spot vary, some offer free access as well as in airport executive lounges, which requires a user to become one of the ISP subscribers that offers Wi-Fi facilities and there were also offers card pre-paid. Whatever your choice for how to access the Wi-Fi, the most important is the existence of Wi-Fi, you can work anywhere and anytime that you do not need to always be stuck in your office to complete each task Mobile phone market (mobile) or dual mode capable GSM cellular network access and wireless Internet networks Wi-Fi (wireless fidelity) continue to increase. Juniper Research is a research project the dual mode mobile phone market in 2012 reached U.S. $ 68 billion.
Currently demand devices that can facilitate user activity to communicate through a network of voice over internet protocol (VoIP) both from the corporate and consumer continued to show growth.
Wifi uses radio frequency waves to transfer data to be sent are divided into several protocols such as 802.11a, 802.11b, 802.11g and 802.11n is the latest to use in the office and the cafe-cafe is frequently used protocols 802.11a/b/g . Due to transfer using radio frequency waves of data sent can easily be captured dijangkauan user Access Point.
One of the WiFi network security protocol used by the first generation of cafes and offices in general, actually, a wired LAN network more secure because there are no protected structures such as Wifi cable which utilizes radio frequency waves that can be captured by all users who are in the range of Access Point tersebut.dan WEP network is one of the security protocol of the easiest in translucent.
Why are easily penetrated, because the encryption key for this system is a static key using RC4 encryption easily in the crack by hackers who easily stole the data packets are sent over the air by using the tools, free tools scattered on the internet and forums, Wifi discussion forum.
