Domain Name System 25 Years Old
The fundamental system of the modern Internet today marks its 25th anniversary. DNS this week marks exactly a quarter 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 the name system appeared on the then tiny Internet, about a hundred nodes were serviced, and only one machine was responsible for name resolution, in the hosts file of which there were records about the location and addresses of computers connected to the network.
When a new computer appeared on the network, a record about a new computer on the network was added to the hosts file, and then this updated file was sent to all other computers on the network. In 1982, the American agency ARPA released the TCP / IP protocol stack for a heterogeneous computing environment. This year is considered the year of birth of the Internet. The TCP / IP protocol involved breaking files into packets and transferring them in different ways. The network began to develop at an incredible speed. By the beginning of 1984, the number of hosts exceeded one thousand, the hosts type files used on each computer became more and more. Problems began to arise: traffic associated with updating information about new computers on the network threatened to block all communication lines; it became increasingly difficult to pick up a unique symbolic name for new computers.
DNS is critical for the operation of the Internet, because to connect to a host, information about its IP address is required, and for people it is easier to remember alphabetic (usually meaningful) addresses than a sequence of digits of an IP address. In some cases, this allows the use of virtual servers, for example, HTTP servers, distinguishing them by request name, in addition, most modern applications that work with the Internet rely on DNS.
© Cyber Security.Ru
At the time the name system appeared on the then tiny Internet, about a hundred nodes were serviced, and only one machine was responsible for name resolution, in the hosts file of which there were records about the location and addresses of computers connected to the network.
When a new computer appeared on the network, a record about a new computer on the network was added to the hosts file, and then this updated file was sent to all other computers on the network. In 1982, the American agency ARPA released the TCP / IP protocol stack for a heterogeneous computing environment. This year is considered the year of birth of the Internet. The TCP / IP protocol involved breaking files into packets and transferring them in different ways. The network began to develop at an incredible speed. By the beginning of 1984, the number of hosts exceeded one thousand, the hosts type files used on each computer became more and more. Problems began to arise: traffic associated with updating information about new computers on the network threatened to block all communication lines; it became increasingly difficult to pick up a unique symbolic name for new computers.
DNS is critical for the operation of the Internet, because to connect to a host, information about its IP address is required, and for people it is easier to remember alphabetic (usually meaningful) addresses than a sequence of digits of an IP address. In some cases, this allows the use of virtual servers, for example, HTTP servers, distinguishing them by request name, in addition, most modern applications that work with the Internet rely on DNS.
© Cyber Security.Ru