DNS : Domain Name System an Internet service that translates domain name into IP address.
IP address : used to uniquely identify a computer over the network.
URL : Uniform Resource Locator, the address of a specific web page or file on the Internet.
Domain Name space : A naming system on which domain names are in a hierarchical and logical tree structure.
Domain Name : a symbolic name associated with an IP address
Name server : Contains the DNS database which consists of domain names and their corresponding IP addresses.
ICANN : Internet Corporation for Assigned Name and Numbers, Non-profit organization which regulates an Internet.
IANA : Internet Assigned Numbers Authority (IANA) is an affiliated authority of ICANN.
Zone : A group of contiguous domains and sub domains in the Domain Name Space.
The resolver : a program which is responsible for initiating the translation of a domain name into an IP address
TLD : Top Level Domain, domains below the root domain
IPv4 /IPv6 : Internet Protocol version 4/6