What is DNS server and why we use DNS server?

Question

What is DNS server and why we use DNS server?

Answer 1

DNS server is called domain name server .it translates your website ip address to letter format .

ex-Website -www.facebook.com ,ip address -31.13.64.129

so if you type 31.13.64.129 in browser then you can also go to www.facebook.com

Answer 2

DNS (Domain Name Service) converts full qualified domain names (like www.google.com) that people use into IP addresses that computers use (74.125.227.144). A DNS server runs the DNS server and answers request from client computer.



So when you type in www.google.com into your browser, you computer checks to see if it knows the IP associated with www.google.com. If it doesn't it checks its lists of DNS servers and asks it if it knows. If it does, it will respond back with the IP address. If it doesn't, it will ask another DNS server. This continues until the request reaches the top level DNS servers. If they have no record of the domain they send back an error.



That's basically how it works. I'm not a DNS expert, so there might be a few things I left off or got wrong, but that's the jist of it.

Answer 3

A DNS server is any computer registered to join the Domain Name System. A DNS server runs special-purpose networking software, features a public IP address, and contains a database of network names and addresses for other Internet hosts.

Answer 4

Okay no one had the acronym correctly identified, it is a Domain Name System and it is an application that resides on a server. As mentioned the Internet uses IP addresses the same way that the telephone network uses telephone numbers. The Internet uses URLs (Universal Resource Locator - Like yahoo.com) the telephone network uses your name and address. You can use a telephone book either hard copy or a web site to look up a name and address. The telephone network is out of date as soon as it is printed as there are changes already. It would be the same with the Internet. URLs can be linked to different IP addresses as businesses move from location to location. As a device is connected to the Internet an IP address is either assigned by a DHCP (Dynamic Host Configuration Protocol - server), or is statically assigned by a network administrator. The DHCP server or network administrator hands out either private IPs (like 192.168.x.y assigned by the Network Administrator or a public IP like 74.125.226.x (google.com in my area) which is controlled by ARIN (American Registry for Internet Numbers). The URL and the IP is sent to a few master DNS servers. As each local server (maintained by ISPs Telco, or network administrators) needs to look up a URL they will query a DNS server higher in the hierarchy and will find out the IP address.



So consider the DNS server to be the web telephone book for the Internet. The DNS server may be instantaneously correct or can be up to a couple of hours out of date.

Answer 5

DNS is - Domain Name Server

it keeps a record of name & IP address.,it is sumthing like when you type any website it understands that text & converts it into ip format coz networking works like that,after that it matches from its record table what that number mean & what is its destination & directs u to the page of the website & saves time

Answer 6

A simple answer, DNS - Domain Name Server, ...



Think of a DNS host as the Postmaster. A name is assigned to an IP address in much the same manner as we use with our postal address with a postal code.



The postmaster takes the website or computer name you are looking for compares it to his list of names and addresses and delivers you or your package for you.



Without DNS we would need to know the IP address for each computer or website we are looking for.

Answer 7

Yes, but not in any currently approved internet form. It is totally outdated, insecure and missing many of the features of current dns, as well as most useful functions for anything now. Even when it was still in use it required massive numbers of updates to work correctly. Since it is no longer supported there are no such downloads available. And a system which can only use up to a 2GB system drive is almost totally useless now.

Answer 8

In the old days, there were other directory services, but they didn't scale well or were slow and non-distributed.



DNS is a distributed database that provides several services. Companies have added features, but the services are pretty stock:



A record, name to IP address.

PTR record, the reverse. IP address to name.

CNAME record, an alias. Name alias to another name.

MX record. Mail routing record.

NS record. Nameserver, says who is in charge of a domain.

AAAA record. IPv6 address record.

SOA record. Defines owner and some parameters for a domain.

TXT record. Simple TXT record.



There are others, but these are the major ones.

Answer 9

DNS = Domain Name Server we use DNS because computer only understand numbers and we, human can't remember numbers. It's easier for us to remember yahoo.com or google.com instead of whole bunch of IP addresses. (And that's where DNS do the translation for us).