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来源：百度知道 编辑：UC知道 时间：2024/05/31 00:37:17
As the computer plays a more and more important hole in the daily life, more and more thing should be done through computer. However, the favorite target of computer hackers is computer, which connected by broadband. some data especially some important information can be stolen by the hackers, which is very dangerous for the computer user.
There are two kinds of hackers. The first one only wants to know how many computers or system that he can crack. The other one kind of hacker is dangerous, who has some malicious intents. The hacker can break security through some vulnerabilities in the computer to steal what the user has stored on the computer. such as passwords for access to the online bank, credit card detail. Absolutely, there are many other aims of computer hacking. For instance, the hacker not only can steal some data, but also can use the computer resource for Distributed Denial Of Service to attacks other c
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The description of WiMAX
nowadays, internet plays a more and more important role in people's daily life. it is known that there are three ways to access the internet: broadband access, WIFI access, Dial-up access. However, all these options have their own problems. A new technology called WiMAX will appear which can solve all of these problems.
WiMAX is short for worldwide interoperability for microwave access. it has many advantages over the three basic options. For instance, WiMAX has a high speed of broadband service. The fastest WiFi connection transmission speed is 54 megabits per second in ordinary conditions, while WiMAX system's speed is much higher, which can pick up to 70 megabits per second. WiMAX also has a broad coverage comparing to small WiFi hotspots, WiFi's range is about 30 miles, whereas WiMAX system can receive the radius from 50km away because of using high frequency. what should be pointed out is that WiMAX syst