D. To introduce the development of the two ways of driving.
D
All over the world the need for more laptops and computers increases each year. Networks have been part of our life. Probably everyone with a portable device has once logged on to a public Wi-Fi network without paying for it, while they are having a coffee, on a train, in a shopping mall or at a hotel. However, is this kind of public Wi-Fi network safe?
Some networks are better protected than others because encryption (加密) methods are used. Therefore, they are safer than others. But a survey in 2017 showed that more than 950 million records were not protected, including addresses, emails, birth dates, phone numbers, passwords and so on. These open Wi-Fi networks are really not safe, because it is very easy for hackers(黑客)to break into the operating system and get people’s private information.
Most smart phones and laptops, by themselves, search and connect to Wi-Fi networks. They usually prefer a network with a connection that has been used before. Hackers’ devices are able to record those searches and look like the trusted Wi-Fi networks. When these smart phones and laptops log on to the networks which are not real, hackers can easily steal their private information.
So next time, when we want to use our laptops or smart phones in public places which offer free Wi-Fi networks, please think it twice or take safe measures before using them.
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