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DNS Full Form

Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or other resources connected to the Internet or a private network.

DNS Full Form

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    Domain names are assigned to organizations and individuals based on their registered IP addresses. To resolve human-readable domain names, client computers query the DNS database into machine-readable IP addresses.

    DNS is a critical part of the Internet infrastructure used in all networks, from small home networks to the largest Internet exchanges.

    DNS Full Form

    History of the DNS

    The Domain Name System (DNS) is a hierarchical naming system for computers, services, or other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of those resources. The DNS is used to resolve human-readable domain names into the numerical IP addresses used by computers to identify resources on the Internet or a private network.

    The DNS protocol was designed by Paul Mockapetris in the early 1980s and was first implemented in 1983. The initial specification, RFC 882, was published in November 1983. The DNS protocol has been updated regularly with new features, including support for IPv6, secure DNS, and DNSSEC.

    DNS is deployed hierarchically, with a root zone at the top of the hierarchy. The root zone contains the top-level domains (TLDs), the highest level of the DNS hierarchy. The Internet Corporation administers Assigned Names and Numbers (ICANN). TLDs are delegated to the registrars of the TLDs, who are responsible for managing the names within their TLDs.

    Domain names are typically registered in the TLDs most relevant to the organization or individual. For example, a company might register a domain name in the .com TLD, while an individual might register a domain name in the .net TLD. Registrants can also register domain names in other T

    Types of DNS Servers

    There are three types of DNS servers: recursive, authoritative, and caching.

    • Recursive DNS servers are the most common type. They are used to resolve domain names into IP addresses.
    • Authoritative DNS servers resolve domain names into IP addresses and provide information about which domains a given IP address is associated with.
    • Caching DNS servers store the results of previous DNS resolutions to speed up future resolutions.

    Working Principles of DNS

    Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of those resources. The DNS protocol is an application layer protocol that operates on top of the TCP/IP protocol suite.

    Domain names are assigned to resources by a registrar. The registrar delegates authority to other name servers to manage specific parts of the namespace. When a user enters a domain name into a web browser or other application, the resolver queries DNS servers to obtain the IP address corresponding to the domain name.

    DNS is used to resolve both domain names and IP addresses. When a user enters a domain name into a web browser, the resolver queries DNS servers to obtain the IP address corresponding to the domain name. If the user enters an IP address, the resolver queries DNS servers to obtain the domain name corresponding to the IP address.

    The DNS protocol is an application layer protocol that operates on top of the TCP/IP protocol suite. DNS uses the User Datagram Protocol (UDP) for communication. DNS messages are sent as UDP packets.

    DNS servers use a caching mechanism to keep track of the results of previous queries. When a DNS server receives a query, it checks its cache to see if it has a record of the requested information. If the server does not have a record of the information, it queries other DNS servers.

    Features of the DNS service

    • The DNS service provides name resolution for computers on the network. It can be used to resolve both hostnames and IP addresses.
    • The DNS service can resolve hostnames and IP addresses to hostnames.
    • The DNS service can be used to resolve both A records and CNAME records.
    • The DNS service can resolve both forward and reverse DNS queries.
    • The DNS service can be used to cache resolved addresses, improving performance.

    Important Features of the DNS

    The Domain Name System (DNS) is a distributed database that stores mappings of domain names to IP addresses. It is a critical piece of the internet infrastructure and ensures that users can easily find the websites they are looking for.

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    Some of the key features of the DNS include:

    Distributed Database: The DNS is a distributed database spread across many servers. This ensures that it is always available and can handle large traffic.

    • The DNS is a distributed database that is spread across many different servers. This ensures that it is always available and can handle large traffic. Hierarchical Structure: The DNS is hierarchical, meaning that the database is organized into a tree-like structure. This makes it easy to navigate and allows for efficient routing of queries.
    • The DNS is hierarchical, meaning that the database is organized into a tree-like structure. This makes it easy to navigate and allows for efficient routing of queries. Flexible: The DNS is very flexible and can be used for various purposes. It can be used to map domain names to IP addresses, but it can also be used for other purposes such as geolocation and load balancing.
    • The DNS is very flexible and can be used for various purposes. It can be used to map domain names to IP addresses, but it can also be used for other purposes such as geol.
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