Explain Domain Name Resolution. For almost all operating systems the default order for Domain Name resolution is as follows. A DNS resolver that implements the iterative approach mandated by RFC 1034.
DNS queryresponse operations are supported over the distributed DNS infrastructure consisting of servers deployed locally at each site or ISP and a special set of root servers. Therefore naming gets less specific while moving from the left to the right. PCs and they tell DNS server to respond only with an answer and not a referral.
Hierarchy of Name Servers Root name servers It is contacted by name servers that can not resolve the name.
A recursive resolver is a server that is usually operated by an ISP or other third-party provider and it knows which other DNS servers it needs to ask to resolve the name of a site with its IP. Domain Name System record types. To solve this problem the DNS system was introduced. In a Fully Qualified Domain Name FQDN the host name is specified by the leftmost label.