This ppt explains the DNS in an easy way with the help of examples using the cisco packet tracer. This creates an easy understanding of the DNS server, it's working, and its usage.

1. DNS
(Domain Name System)
Presented by : P Venu Gopal Naidu(165)
T B Harsha Vardhan(197)
K Ganesh Narasimha Reddy(156)
N Keshava Naidu(179)

2. What is DNS?
DNS Technology Allows Hosts On TCP/IP Networks To Be Address
By Its Name. DNS Automatically Convert The Names We Type In
Our Web Browsers Address Bar To The IP Addresses Of Web
Servers Hosting Those Sites.
Internet.w3school.com
(1) (2) (3)
1 . Hostname
2 . Organization Domain
3 . Top-Level

3. How DNS server works?

4. HOW DNS SERVER WORKS
• DNS is a global system for translating IP addresses to
human-readable domain names. When a user tries to
access a web address like “example.com”, their web
browser or application performs a DNS Query against a
DNS server, supplying the hostname. The DNS server
takes the hostname and resolves it into a numeric IP
address, which the web browser can connect to.

5. Cont…
• A component called a DNS Resolver is responsible for
checking if the hostname is available in local cache, and if
not, contacts a series of DNS Name Servers, until
eventually it receives the IP of the service the user is trying
to reach, and returns it to the browser or application. This
usually takes less than a second.

6. TYPES OF DNS SERVER:

7. Dns Working in Cisco Packet Tracer: