Domain Name System

What is DNS?

DNS is the distributed naming system for computers, services or any resources connected

to the Internet or a private network

192.248.56.21

www.jfn.ac.lk

How it works?

Source: http://computer.howstuffworks.com/dns.htm

Source: http://computer.howstuffworks.com/dns.htm

Source: http://en.wikipedia.org/wiki/File:An_example_of_theoretical_DNS_recursion.svg

DNS RECORDS

AThis record return

32bit ipV4 Address

AAAA

This record return 128bit ipV6

Address

CNAME

Alias of one name to another

MX

Map a domain to a list of massage transfer agents for

that domain

NS

Connecting to the DNS zone

Questions ?