***************************************************** * Description: Knowledge of domain name server [DNS] * Compatiablity: RDBMS 11g, 12c * Date: 04:02 PM EST, 05/13/2017 ***************************************************** <1> Domain Name Server: | |__ DNS is "domain name/IP" database. It maintain a directory of domain names and translate them to Internet Protocol (IP) addresses. The purpose is that internet user can remember a human readable website name instead of public IP of web server. Acorss the Internet, the domain name/IP info are gathered together and housed at the Central Registry known as internet root servers. By Auguest 2014, there are 380 root servers in 13 groups. [10 in U.S., 1 in London, 1 in Stockhom and 1 in Japan]. Your ISP, such as Verizon, usually provides the IP/domain translation service via local installed doamin name server CLIENT. After you register a new domain name or when you update the DNS servers on your domain name, it usually takes about 12-36 hours for the domain name servers world-wide to be updated and able to access the information. This 36-hour period is referred to as propagation. <2> Register a Doamin Name: | |__ You can register a domain name through some third party company websites, such as GoDaddy, AWS. After register domain name, you can also rent a web hosting server through GoDaddy, no matter Linux or Windows OS, and upload all .html file to that web server for being visited.
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