Top-level domain, level two domain name

Top-level domain, level two domain name

(1) Top-level domain name (domain name) such as. com,. NET,. edu,. gov,. cn, etc.

(2) The entire DNS system is composed of many domain names, each domain name and subdivide more domains, the DNS domain constitutes a hierarchical tree structure from top to bottom are root domain name, top-level domain name, level two domain name ... Finally, the host name

(3) www.sina.com.cn--where www.com.cn is the domain name of the Sina Web server, the domain name is a level three domain name

For the convenience of People's memory-internet uses the domain name to identify the computer, through the DNS (domain Name System) translates the domain name to the IP address, each level domain name has the corresponding DNS domain name server.

(1) Simply speaking, the domain name is for human use, and the IP address is for human use, by the DNS to do the translation

(2) For example: www.helloworld.cn helloworld.cn is the domain name

Domain name: can be composed of several parts, the parts are separated by dots, the domain name is preceded by [host type information] (WWW\FTP) and [transport protocol information] constitute the (URL) http://www.helloworld.cn

Above are some of their own experience, welcome to discuss

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Top-level domain, level two domain name