The clear advantage of DNS is that it makes it easy for us to remember the names of websites by converting or displaying the IP addresses(that are in numbers) in understandable names.
static name resolution
dns
referral
A forwarder is a Domain Name System (DNS) server on a network used to forward DNS queries for external DNS names to DNS servers outside of that network. You can also forward queries according to specific domain names using conditional forwarders.A DNS server on a network is designated as a forwarder by having the other DNS servers in the network forward the queries they cannot resolve locally to that DNS server. By using a forwarder, you can manage name resolution for names outside of your network, such as names on the Internet, and improve the efficiency of name resolution for the computers in your network. For more information about forwarders and conditional forwarders
nslookup
Name resolution
Nslookup
Reverse name resolution
The nslookup command is a user interface to the DNS service, and provides name resolution lookup (among other things). It can also be used to debug problems with DNS resolution and the DNS configuration itself, return zone information, etc.
DNS is Domain name system for short . Domain name system maps a name to an address. Protocol that relies upon DNS is TCP/IP .tcpip protocol
In computer networking, reverse DNS lookup or reverse DNS resolution is the determination of a domain name that is associated with given IP adress using DNS of the internet.
Host names can be resolved by either using the /etc/hosts file or by using DNS.