Что (кто) такое Domain Name System - определение

SYSTEM TO IDENTIFY RESOURCES ON A NETWORK

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Domain Name System

<networking> (DNS) A general-purpose distributed, replicated, data query service chiefly used on Internet for translating hostnames into Internet addresses. Also, the style of hostname used on the Internet, though such a name is properly called a fully qualified domain name. DNS can be configured to use a sequence of name servers, based on the domains in the name being looked for, until a match is found. The name resolution client (e.g. Unix's gethostbyname() library function) can be configured to search for host information in the following order: first in the local {hosts file}, second in NIS and third in DNS. This sequencing of Naming Services is sometimes called "name service switching". Under Solaris is configured in the file /etc/nsswitch.conf. DNS can be queried interactively using the command nslookup. It is defined in STD 13, RFC 1034, RFC 1035, RFC 1591. BIND is a common DNS server. {Info from Virtual Office, Inc. (http://virtual.office.com/domains.html)}. (2001-05-14)

Domain Name System

The Domain Name System (DNS) is the hierarchical and decentralized naming system used to identify computers reachable through the Internet or other Internet Protocol (IP) networks. The resource records contained in the DNS associate domain names with other forms of information.

https://en.wikipedia.org/wiki/Domain_Name_System

DNS

1. Domain Name System. 2. Distributed Name Service. See DECdns.

Википедия

Domain Name System

The Domain Name System (DNS) is a hierarchical and distributed naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names assigned to each of the associated entities. Most prominently, it translates readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols. The Domain Name System has been an essential component of the functionality of the Internet since 1985.

The Domain Name System delegates the responsibility of assigning domain names and mapping those names to Internet resources by designating authoritative name servers for each domain. Network administrators may delegate authority over sub-domains of their allocated name space to other name servers. This mechanism provides distributed and fault-tolerant service and was designed to avoid a single large central database.

The Domain Name System also specifies the technical functionality of the database service that is at its core. It defines the DNS protocol, a detailed specification of the data structures and data communication exchanges used in the DNS, as part of the Internet Protocol Suite.

The Internet maintains two principal namespaces, the domain name hierarchy and the IP address spaces. The Domain Name System maintains the domain name hierarchy and provides translation services between it and the address spaces. Internet name servers and a communication protocol implement the Domain Name System. A DNS name server is a server that stores the DNS records for a domain; a DNS name server responds with answers to queries against its database.

The most common types of records stored in the DNS database are for start of authority (SOA), IP addresses (A and AAAA), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS lookups (PTR), and domain name aliases (CNAME). Although not intended to be a general purpose database, DNS has been expanded over time to store records for other types of data for either automatic lookups, such as DNSSEC records, or for human queries such as responsible person (RP) records. As a general purpose database, the DNS has also been used in combating unsolicited email (spam) by storing a real-time blackhole list (RBL). The DNS database is traditionally stored in a structured text file, the zone file, but other database systems are common.

The Domain Name System originally used the User Datagram Protocol (UDP) as transport over IP. Reliability, security, and privacy concerns spawned the use of the Transmission Control Protocol (TCP) as well as numerous other protocol developments.

https://en.wikipedia.org/wiki/Domain Name System

Примеры произношения для Domain Name System

1. Now the domain name system

ted-talks_1329_ClayShirky_2012S-320k

2. We made the domain name system hierarchical.

Clark _ Talks at Google

3. The domain name system is insecure.

Clark _ Talks at Google

4. I mean, the domain name system wasn't done particularly well,

How the Internet Became Commercial _ Shane Greenstein _ Talks at Google

5. They want to take them out of the domain name system.

ted-talks_1329_ClayShirky_2012S-320k

Примеры употребления для Domain Name System

1. One of its key roles has been maintaining the integrity of the Web‘s domain name system.

2. That pressure increased this week when the European Union publicly threw its weight behind developing country demands for more international oversight of the domain name system.

3. At issue is the role of the US government in overseeing the internet‘s address structure, called the domain name system (DNS), which enables communication between the world‘s computers.

4. ICANN, a California–based non–profit group, cannot make changes to the domain–name system, which matches Web site names to numerical addresses that computers can read without the approval of the U.S.

5. Critics contend that in a worst–case scenario, countries refusing to accept US control could establish their own separate Domain Name System, thereby fracturing the internet, with addresses in some regions becoming unreachable in others.