Understanding DNS architecture

- The next topic to discuss is DNS and DNS architecture.…"DNS" stands for Domain Name Service,…and its job is to take English-like computer names…that humans can remember, and map them to…IP addresses that humans have more difficulty remembering.…DNS has three elements.…First, it has DNS namespace.…Next, it has name servers.…And finally, it has a resolver.…The DNS namespace is a DNS standard that defines…a tree-like structure of computer names.…

Each branch of the tree-like structure identifies…a different domain that the DNS server is aware of.…Each domain contains the host name,…an IP address, and additional information…of all the computers within that domain.…Query options are used by DNS servers to retrieve…records from a domain about specific computers…that are located in that domain.…Name servers are servers that maintain…information about the domain trees.…

The name servers contain authoritative information about…one or more domains that that server is aware of.…Name servers respond to queries about the domains…