How many of you are leaving the network, the Dead star.

Before you start, ask a question, how many of you will die when you leave the network?

No traffic will die, no Wi-Fi will die, no network cable will die, in short, not hanging on the internet life is not happy, this creature please count on a small one. Therefore, January 21 spread the country's vigorous network paralysis, so that people can not be micro-bo, not open the mailbox, can not brush Taobao, can not see the video, really is life as dead!

Who is behind all this? A thing called DNS came to everyone. According to a number of DNS service providers, the country all the common top-level domain root server anomalies, resulting in most of the domestic users can not correctly resolve the domain name, a large number of well-known web sites can not open, affecting tens of millions of of netizens.

The light element, DNS in the end is where the holy, what must kill stunt, will let me big celestial network so fragile?

What is DNS?

DNS is the abbreviation of domain Name System, is a core service of the Internet, it is a distributed database that can map domain name and IP address to each other, it can make people access the Internet more conveniently, without remembering the IP string that can be read directly by machine.

Do you understand the above #@￥%......&? Good, witty little weave to explain in plain language.

For example, as a failure in English learning slag, small series if you want to understand the "hello" how to do it, it is necessary to help Google translation is "Hello". DNS and Google translation of the role of almost, if you want to go to Baidu, DNS will be the URL www.baidu.com translated into IP address 192.168.1.1, tell the server you want to open this site.

Why is DNS important?

Web site So much, users will not remember to live a string of digital IP, so the importance of DNS is self-evident.

And in the January 21 of the network paralysis, a large number of Web sites such as COM,. cn, and so on hijacked to 65.49.2.178 this IP, resulting in these sites can not be opened normally.

In fact, can not open the Web page or small things, if the site is hijacked to the phishing site, it will be very easy to be deceived, resulting in personal information leakage or property losses.

has been plagued by DNS more than once.

In fact, DNS has more than once let our network into paralysis, in 2013 alone, there have been two times NDS caused a major failure. One is July 6, Shanghai Unicom DNS equipment failure, resulting in 2G, 3G mobile phone users can not access the Internet, the other is August 25, 2013. The CN root domain server is in full trouble.

Of course, lying in the gun is not only our once, Sweden, which has always boasted that the network is safe, has also been a DNS recruit, leading to all. SE sites are inaccessible, but. SE's domain name is much smaller than. cn or. com, so there is no large-scale downtime.

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