What is Domain Name System (DNS) | DNS | How DNS Works ? - Part 2

#DNS #Domain #DomainNameSystem #Cybersecurity #EthicalHacking #ComputerNetwork #IPAddress #DomainName

In this video, we will discuss about DNS (Domain Name System), It will translate your domain name into IP addresses with the help of Lookup Table - Forward Lookup (Domain Name into IP Address) and Reverse Lookup - (IP Address to Domain Name).

What is the need of DNS ?
- Humans are not good at remembering numerical data such as IP address.
- In case of, Website web server gets migrated or changed

What is DNS?
How DNS works?
What is Domain Name System ?
How DNS is important in Cybersecurity?

The idea of name space is based on its IP address, As addresses are unique, it needs name should also be unique.

It can be organized in two ways :
Flat Namespace
Hierarchical Namespace

Flat Namespace : A name in this space is a sequence of characters without any structure.
The main disadvantage of Flat Namespace is : it cannot used for large system and Internet is very large.

Hierarchical Namespace: It is made up of several parts and the name have some structure.
The first part can be a nature of organization (.com), the second part can be a name of organization (Marwadi) and the third part can be anything (ftp, department, www).

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