DNS from Getting Started to mastering (i) DNS introduction

• Introduction to DNS

  DNS (domain Name System, domainname)

• on the Internet as domain names andIP Addressone of the mutual mappingsDistributed databaseTo make it easier for users to accessInternet, instead of remembering the number of IP strings that can be read directly by the machine. ThroughHostname, the process of eventually getting the IP address for that hostname is called Domain name resolution (or hostname resolution). The DNS protocol runs onUdpprotocol, use the port number 53.

  
  

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• You know, to want to communicate in the Internet, is to be through the IP , for example ( 8.8.8.8 ), in the early days of the internet, because of the number of connected users, everyone through the IP communication, it is possible, but with the popularization of the Internet, IP Address gradually increased, everyone with IP directly appears to be relatively humble. So the pioneers wanted to solve the problem, and DNS was born.

• Popular is to

Domain--->> IP address
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In addition, he can also reverse the analysis of yo!

The following is the WindowsXP DNS Setup method:

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Domain name structure

Typically, the general structure of the Internet host domain name is: hostname. Level three domain name. Level two domain name. The top-level domain name of the Internet is registered and managed by the Internet Network association domain name Registry Query Committee responsible for network address allocation, which also assigns a unique IP address to each host on the Internet. There are three major network information centers around the world: Inter-nic in the United States, the United States and other regions, Ripe-nic in the Netherlands, responsible for the European region and APNIC in Japan, responsible for the Asia Pacific region.

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The current global total 13, root domain server:

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Domain name resolution diagram:

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This article is from the "Perfect World" blog, so be sure to keep this source http://angelababy.blog.51cto.com/6326130/1762294

DNS from Getting Started to mastering (i) DNS introduction