What is DNS??
Types Of Domain Name System (DNS) Servers :There are two type of Domain Name System (DNS) Servers,
1: Root Name Servers
The root servers represent the top level hierarchy of the DNS. This top level DNS servers contain the complete database of domain names and their corresponding IP addresses. Currently, there are 13 root servers distributed globally
2: Local Name Servers
How DNS Server Works?
- You type a URL such as “http://www.wildhacker.com” on your browser’s address bar.
- After getting request computer will send a request to the local name server to resolve the domain name into its corresponding IP address. This request is often referred to as a DNS query.
- The local name server will receive the query to find out whether it contains the matching name and IP address in its database.
- If found, the corresponding IP address (response) is returned.
- If not, the query is automatically passed on to another server that is in the next higher level of DNS hierarchy.
- If lower level DNS server does not contain the record for a given domain name then the DNS quert eventually reaches one of the root name server to obtain the response.
- This process continues until the query reaches the server that contains the matching name and IP address.
- The IP address (response) then flows back the chain in the reverse order to your computer.
Filed Under: HOW STUFFS WORK
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