Answer / urja shah

DNS is the Domain Name Server it contains the ip addresses
of the corresponding domain name,so inorder to access any of
the website user need not to remember ip address of the site
just enter domain in url and it will be converted to ip
address by DNS.

Answer / jitendra soni

DNS has database which has ip addresses corrensponding to
releted FQDN(fully qualiffied domain name). when we ping to
any machine or browse any site it resolves machine name or
site name to ipaddress elese if we put ip-address it
resoles ip-address to hostmachine or web-url.

In every machine it has host file in system32. the same
function DNS does but host file is locally accessiable and
DNS is accessiable throught the domain.

Answer / gtkhan

Basically DNS is used for IP to host or Host to IP resolution.

For example you can use www.google.com or you can use IP of the google.

It will redirect you to the google webpage.

Alternatively you can refer below link for better understanding.
http://technet.microsoft.com/en-us/library/cc772774(v=ws.10).aspx

Answer / rohan dhanji

A single client can access internet websites using the ISP's DNS server. but if the client machine is trying to access intranet sites, it will not be able to, hence the host to IP resolution has to be done by the DNS and it is needed in the domain network. This problem can be solved locally by adding the host and IP address to the HOST file locally in the client and if the no. of clients are more, you need to do the same procedure to all the clients; therefore to ease the process and centrally manage the Host to IP or IP to host resolution, we need a DNS in the domain network.

Answer / nathantharumam

DNS server we can give security for system resource and can
give restrictions.

if the client accessing internet. its not means the client
system not under with DNS.

DNS and Internet access are different things.

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