DNS

Question 1

What is DNS?

Answer 1

DNS stands for Domain Name System, it provides a way for devices to communicate with each other without the need of memorizing long strings of numbers in our IP addresses.

Question 2

Whats an IP address and what does a it look like?

Answer 2

In the case of DNS, an IP address is just a unique number given to computers on a network, used for communication and identification. An IP address for IPv4 (common IP Layout) looks like: 10.10.109.209.

Question 3

Whats an example of a DNS VS. IP?

Answer 3

DNS: tryhackme.com IP: 10.10.109.209

Question 4

Whats Domain Hierarchy?

Answer 4

DNS: tryhackme.com. If you look at this domain you can see that it has parts, these parts are broken into a hierarchy(from top to bottom): Root Domain, Top-Level Domain, and Second-Level Domain.

Question 5

Root Domain, Top-Level Domain, and Second-Level Domain

Answer 5

Root Domain: The dot part of the domain “.”

Top-Level Domain: TLD is the rightmost part of the domain think .edu, .com, and .gov

Second-Level Domain: This is the part of the domain that actually registers the domain name of the site

Question 6

How do DNS Request work?

Answer 6

The original client (this is going to our browser in most circumstances) is going to make a request, this is going to get forwarded to a RDNS or Recursive DNS server (which will see if can fulfill the request) if it cannot then it forwards the request to the Root DNS server, these Root Servers are the backbone of DNS which are able to redirect back to our browser.