The security risk of domain Name System in China's network with wide-range fault exposure

China News agency, Beijing, May 22 (Xinhua Liu Yuying) Due to the Storm audio and video site domain name resolution problems, the number of provinces in the province of 19th, a large range of network failures.　　Experts from China's national domain name Registry have pointed out that this exposes the potential security risks in the links of China's domain name management system.　　19th, Jiangsu, Anhui, Guangxi, Hainan, Gansu, Zhejiang and other provinces have netizens reflect not open the Web page, QQ, MSN and other Instant Messaging tools drop line and so on.　　China Telecom ruled out the trouble that night after explaining that the storm audio and video site of its own domain name resolution failure caused the Chinese telecom DNS server access to the sudden increase in network processing performance. Why is a website's domain name resolution failure leading to a wide range of network failures?　　According to the introduction, according to the technical principle of domain name resolution, the complete domain Name System consists of four levels of recursive domain Name service system, root domain Service system, top-level domain Name service system and all levels of Domain Name service system. Xiaodong, deputy director and chief engineer of China Internet Network Information Center, a national domain name registry, said that when the public visited a Web site or other Internet service, they needed to complete a hierarchical query of their domain names in the global networks.　　Failure at any one level will result in a certain range of network failures. Xiaodong said that the hosting storm audio and video domain name of the server due to attack, so that the domain name resolution failure. Because of the setting problem, the user Client software continuously sends the addressing request to the network, which makes the telecom's recursive domain Name Service system load too large and the processing performance is reduced.　　Although the fault in the domain Name service chain is not high, but also led to a wide range of network failures, exposing the Chinese domain Name System many links exist potential security risks. According to the introduction, domain name is the public access to the Internet's starting point and the entrance, the equivalent of the Internet's central nervous system, domain Name system failure will directly cause the Internet failure even into paralysis. The United States, Germany, Sweden, the Netherlands, Japan, Korea and other countries attach great importance to the domain Name System security. Finish