Domain name server

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The document discusses domain name servers (DNS), explaining that DNS translates domain names to IP addresses, allowing computers to connect to websites by name instead of numeric address. It describes how DNS works by checking its own database and cache for domain name to IP address mappings, then querying other DNS servers if needed to find the correct mapping to return. The document also mentions configuring a DNS server.

Technology

DOMAIN NAME SERVER
Isuru Deminda Thilakarathne
ICT/12/125

What is DNS ?
• Domain Name Server
An internet service that translate domain
names in to IP Addresses.
Domain Name IP Address
Kdu.ac.lk 222.165.190.172

How DNS Server Works ?
DNS Server
DNS Server
I need Direction
to kdu.ac.lk
The domain name is not
in my database or cache.
I’ll try another DNS Server
That’s in my cash! Its maps
to this IP Address
“222.165.190.172”
Great! I’ll cache that
for a while in case I get
more requests.
Thanks for the Direction !
Now to find lots of great
Infromation.
kdu.ac.lk

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The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for the purpose of locating and identifying computer services and devices with the underlying network protocols. By providing a worldwide, distributed directory service, the Domain Name System is an essential component of the functionality of the Internet.

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