Domain Name System And Network Address Translation

Most prominently it translates more readily memorized domain names to the numerical ip addresses needed for locating and.

Domain name system and network address translation. Most of the network traffic in a stub domain is local so it doesn t travel outside the internal network. Name to address resolution the host request the dns name server to resolve the domain name. In the picture above we see dc a in our corporate environment and dc b in our dmz environment. Dc a has a network address in the 192 x x x network and dc b has a network address in the 172 x x x network.

Overlapping networks also result when two companies both of whom use rfc 1918 ip addresses in their. The domain name system dns is a hierarchical and decentralized naming system for computers services or other resources connected to the internet or a private network. The dns resolver is the client pc you in that hotel example which sends the query to the dns server the. The technique was originally used to avoid the need to assign a new address to every host when a network was moved or when the upstream internet service provider was replaced.

And the name server returns the ip address corresponding to that domain name to the host so that the host can future connect to that ip address. It refers to the process of translation of a domain name to its respective ip address. Remember that dns stands for domain name system or domain name service and that a dns server translates domain names into their ip addresses. Of course any computers that use unregistered ip addresses must use network address translation to communicate with the rest of the world.

When the browser receives the address it connects to the web site. Nat network address translation nat translates one ip address to another. Network address translation nat is a method of remapping an ip address space into another by modifying network address information in the ip header of packets while they are in transit across a traffic routing device. This can be a source address or a destination address.

This document demonstrates how you can use network address translation nat for overlapping networks. Overlapping networks result when you assign an ip address to a device on your network that is already legally owned and assigned to a different device on the internet or outside network. Network address translation nat a technology that allows a gateway usually a router or firewall to rewrite the source ip of an outgoing ip datagram while retaining the original ip in order to rewrite it into the response. A stub domain can include both registered and unregistered ip addresses.

It associates various information with domain names assigned to each of the participating entities. In itself this is by no means a.