individual hosts refer to separate computers or services through a domain
subdomain extends the parent domain
A computer designated to translate domain names into IP addresses.
Name servers give answers to queries about domains under their control. Otherwise, they point to other servers or serve cached copies of other name server's data
Simple text file that contains the mappings between domain names and IP.
Stored in Name Servers
An organization that manages the reservation of Internet domain.
Eg: Vietnam government manages the reservation of .vn domain.