session-09.txt

facebook.com
google.com

DNS resolver -> responsible to get IP address for the domains

Root servers -> there are 13 root servers in the world formed by different organisations

Domain information and TLD information

TLD -> top level domains

.com
.us
.in
.uk
.net
.org
.edu
.co
.ai
.shop
.online

What happens if we buy the domain?

godaddy, hostinger, aws, gcp, azure, etc...

joindevops.com
1. availability check -> check with TLD owner is that domain available or not?
2. if available, collect the details name, company, address, mobile, email id, payment info, etc.
3. when we complete payment, godaddy updates TLD about buyer details and domain details..

4. create one A record againts the domain

joindevops.com A 167.89.87.23

update anything in your domain it propagates to TLD..

Root servers
=============
tracks all the TLD and their addresses..

1. how many servers?
2. what is our infra capacity
3. how much funding we have

.siva -> TLD

I need to approach popular domain registars like godaddy, hostinger, etc.

Root servers has TLD information...


Browser -> Cache -> OS -> Cache -> ISP DNS Resolver -> Cache -> Root servers -> TLD information -> Contact TLD -> godaddy -> it will now fetch A record for us

ED -> 
Local police -> MOEA -> MOHA -> Interpole police -> US courts -> Porkbun

Domain registars -> Porkbun
We can change domain authority to another company

Tuvalu Gov -> .tv
.in -> Indian government
ivs.tv -> video advertising company

NS -> Name servers

Who is managing the domain, who is responsible to provide IP address..

DNS Records
===============
TTL -> Time to Live -> How much time to live in cache or How much time to update
A -> Holds the IP address of your domain

3600S

atleast 1 day before reduce TTL to 1sec

once everything is fine, take TTL back to 3600

What are root servers?
What are TLD
What are domain registars?
What are nameservers?
WHat is A record?

Book a domain
temp -> hostinger -> .online
perm -> go daddy