The domain name system is 25 years old
The foundational system of the modern Internet today celebrates its 25th anniversary. The DNS system this week marks exactly a quarter of a century. In fact, the name system appeared 8 years before the birth of the modern network, since the WWW concept appeared only in 1991.
At the time of the emergence of the name system in the then tiny Internet, there were about a hundred nodes serviced, and only one machine was responsible for resolving the names, in the hosts file which contained records about the location and addresses of computers connected to the network.
When a new computer appeared on the network, an entry was added to the hosts file about the new computer on the network, and then this updated file was sent to all other computers on the network. In 1982, the US agency ARPA released the TCP / IP protocol stack for a heterogeneous computing environment. This year is considered the birth year of the Internet. The TCP / IP protocol assumed splitting files into packets and transferring them along different paths. The network began to develop at an incredible speed. By the beginning of 1984, the number of hosts exceeded one thousand, the files like hosts used on each computer became more and more. Problems began to arise: the traffic associated with updating information about new computers on the network threatened to block all lines of communication; it was getting harder and harder to find a unique symbolic name for new computers. And now, in 1983, the hierarchical system, called the Domain Name System DNS, the domain name system, replaced the flat naming system for computers on the Internet.
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DNS is critical for the Internet, because connecting to a host requires information about its IP address, and it is easier for people to memorize alphabetic (usually meaningful) addresses than a sequence of digits of an IP address. In some cases, this allows you to use virtual servers, for example, HTTP servers, distinguishing them by request name, in addition, most modern applications that work with the Internet rely on DNS.
© «Cybersecuity.Ru»
At the time of the emergence of the name system in the then tiny Internet, there were about a hundred nodes serviced, and only one machine was responsible for resolving the names, in the hosts file which contained records about the location and addresses of computers connected to the network.
When a new computer appeared on the network, an entry was added to the hosts file about the new computer on the network, and then this updated file was sent to all other computers on the network. In 1982, the US agency ARPA released the TCP / IP protocol stack for a heterogeneous computing environment. This year is considered the birth year of the Internet. The TCP / IP protocol assumed splitting files into packets and transferring them along different paths. The network began to develop at an incredible speed. By the beginning of 1984, the number of hosts exceeded one thousand, the files like hosts used on each computer became more and more. Problems began to arise: the traffic associated with updating information about new computers on the network threatened to block all lines of communication; it was getting harder and harder to find a unique symbolic name for new computers. And now, in 1983, the hierarchical system, called the Domain Name System DNS, the domain name system, replaced the flat naming system for computers on the Internet.
')
DNS is critical for the Internet, because connecting to a host requires information about its IP address, and it is easier for people to memorize alphabetic (usually meaningful) addresses than a sequence of digits of an IP address. In some cases, this allows you to use virtual servers, for example, HTTP servers, distinguishing them by request name, in addition, most modern applications that work with the Internet rely on DNS.
© «Cybersecuity.Ru»
Source: https://habr.com/ru/post/19557/
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