China top-level domain root server failure Most sites are affected

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest stationmaster buy cloud host technology Hall

Sina Science and technology news January 21 afternoon, according to a number of DNS service providers revealed that 3 o'clock in the afternoon today, the country all the common top-level domain root anomalies, resulting in some domestic users can not access. com domain name Web site, the national Internet links cause systemic impact.

The root server is primarily used to manage the home directory of the Internet. There are only 13 units in the world, the 13 root domain names are "A" to "M", of which 10 are set in the United States, and each has a set in the UK, Sweden and Japan.

"Simply put, we visit the baidu.com domain name of the site dignitaries point to the root server, the root service will then point the user to the. com server,. com's parsing server then point the user to baidu.com. "A DNS tech expert explained that the problem is only in China, that the global root servers are not in trouble, and the problem is likely to be domestic network operators.

"This access failure is now around 3:20 P.M., and when a user requests a root server, it is directed to an IP address (a record), which is completely wrong." "The experts said.

According to 360 security Guardian official Micro Bo revealed, after 360 website Guardian test found that many sites were resolved to 65.49 2.178, the reason is that the current international node failure, domestic two-thirds DNS is paralysed.

The experts explained that some users can also normal access to the Internet, because its network DNS server has a certain amount of cache time, if the root server failure persists, most of the country's Web site will be affected. (Nan)

Noun Explanation:

What is DNS?

For example, zh.wikipedia.org as a domain name corresponds to the IP address 208.80.154.225. DNS is like an automatic phone book, we can call the Wikipedia name directly instead of the phone number (IP address). DNS after we directly call the name of the Web site will be like zh.wikipedia.org as easy to use the name of the human to transform imaging 208.80.154.225 as easy to identify the machine IP address.