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lookup dns from ip

If I give you an IP address in the address bar of your browser, DNS will still take place?

In my undertstanding, we search DNS to resolve the name of a resource on the Internet in an IP address. But what if I have the IP address and type I, which directly in the address bar? , Will that still go to my DNS server? Or will it seek data directly from the source?

if you have a specific IP address, assigned to the private networks, possibly a DNS look-up will be necessary. However, this happens internally, not necessarily for the user, but the PC itself. DNS is provided for their for most private domains necessary to enter into as many networks as you can in themselves. However, a public IP address has a specific DNS address for each of which is complementary sites. yahoo said … Yahoo's Web site has a separate domainfor SAN or Storage Area Network … DNS each corresponding to a particular site for those heading to …

DNS stands for Domain Name System. It

consists two components:

DNS server software and DNS Client. Client

requests for the host name resolving and server does the same by translating the

hostname to IP address. We need not to know the actual location of

the machine where it is. The actual location might be changed from time to time

but domain name will remain same. This works as a global directory of Internet.

Other Application of DNS:

Mail Server Agents also use DNS to find the

particular address to deliver the e-mail. MX records also provides

the location of the mail server where to deliver the e-mail.

Types of DNS records:

1. A records maps a hostname to 32 bit IPv4 address.

2. AAAA record maps a host name to 128 bit IPv6

address.

3. CNAME record stands for canonical name record

used for aliasing the one name to many names.

4. LOC record specifies the physical location of the

host.

5. MX record stands for Mail Exchange record maps a

domain name to list of mail exchange servers of that domain.

6. PTR record maps an IPv4 address to

canonical name of the host. This is reverse DNS lookup.

7. NS record ( name server record) maps a domain

name to a list of DNS servers authoritative for that domain. Delegation is

dependent on NS records.

8. SOA record ( start of authority record):

This specifies the DNS server providing authoritative information about any

internet domain, e-mail address of domain admin, domain serial number, and the

timers relating to refreshing the zone.

9. SRV record stands for service location record.

10. NAPTR record stands for naming authority

pointer. It supports regular expression based rewriting.

11. WKS record stands for well known service

records. It gives the list of servers offering well known service like HTTP,

FTP, POP3 etc.

Author is an MCSE and having more than 8 Yrs. of Experience in Networking and System Administration.
Has delivered guest lecture in various Indian Colleges. He can be contacted at kkpathak@technetindia.net

Web Site: http://www.technetindia.net

DNS Windows 2003 Server