Original subtitles

The three main functions of DNS in the previous video, we define DNS and briefly discussed that its

core function is to translate domain names into IP addresses.

This function is known as name resolution, since in most cases names are resolved to IP.

In addition to name resolution, though, DNS happens to have two other main elements, namely namespace

and name registration.

Namespace is about how domain names are structured and used in terms of what makes a name valid.

What kind of format it should have.

What characters and symbols are allowed in it.

As well as how names are interpreted.

Name registration These, as the name suggests how a domain is registered, how its uniqueness is guaranteed,

and what are the registration authorities responsible for the name assignment process.

Every one of these areas is wide and deep, warranting a great deal of study in its own right.

Because of that reason, each of those functions has been allocated its own section with the aim to

study and understand fully all three functions of DNS in as much detail as possible, starting with

namespace.