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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.
Domain name system in computer networks pdf. Introduction the internet model that follow the client server paradigm. Ip address 32 bit used for addressing datagrams name e g gaia cs umass edu used by humans how to map between ip addresses and names. Computer networks subject is included in b tech cse bca mca m tech.
The dns is a supporting program that is used by other programs such as e mail. Dns domain name system name service in internet zone is an administrative unit domain is a subtree. A domain name is an identification label that defines a realm of administrative autonomy authority or control in the internet based on the domain name system dns.
Name to address resolution the host request the dns name server to resolve the domain name. Domain name system dns enables you to use hierarchical friendly names to easily locate computers and other resources on an ip network. The ohio state university raj jain 24 15 name resolution cont each computer has a name resolver routine e g gethostbyname in unix each resolver knows the name of a local dns server resolver sends a dns request to the server dns server either gives the answer forwards the request to another server or gives a referral referral next server to whom request should be sent.
The following sections describe the basic dns concepts including features explained in newer requests for comments rfcs such as dynamic update from the internet engineering task force ietf. Domain name system people. Avs name passport internet hosts routers.
In simple terms a domain name system dns is a collection of databases that translate hostnames to ip addresses. However the ip protocol needs the ip address. Domain names are used in various networking contexts and application specific naming and addressing purposes.
Dns stands for domain name system is used to as the medium to translate domain names to their respective ip addresses when a client initiates a request query. Domain name system domain name system the domain name system dns is an application layer protocol for mapping domain names to ip addresses. Distributed database implemented in hierarchy of.
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What Is Dns Domain Name System Dns Server And Ip Address Concepts Explained
