What is DNS search?
Domain name search (DNS) is a process involved in obtaining an Internet protocol address (IP) when a DNS resolution request is submitted. It can also be steps taken to solve the IP address when a reverse DNS search is required. The DNS system is a interconnected network of computer servers organized in the domain hierarchy and subdomain. Depending on the nature of DNS resolution and what DNS information is in DNS servers, DNS search can travel lastrally across the DNS system or be handed over to ascendant or root servers. The response to the resolution request will eventually be returned to a computer or network device that started searching DNS.
network devices, including computers, usually have a local file called Host file that will first be searched when DNS searches start. This file is held in a permanent storage and contains static IP items associated with machines or domain names. If the search name or IP Addressnot in this file, the network device will contact the local DNS server, which is statically or dynamically configured to its configuration file adapter adapter adapter. This is usually a DNS server that belongs to Internet service providers (ISP) or business network.
If the local DNS server can solve the DNS resolution request, it will send a DNS resolution reaction to a network device that has started searching DNS. Depending on the information stored by the local DNS server, the request may pass the request. The local DNS server will eventually receive the answer back, the information received cache and responds to the DNS search initiator with the required information. The side requirement is usually initiated when the local server knows how to contact the DNS server responsible for the desired domain, but does not know how to achieve a subdomain or a specific domain machine.
When the local DNS server has no informationCe, sends a request up via the DNS hierarchy towards the DNS root server. Ascendant DNS servers in hierarchy usually behave in the same way as local DNS servers. They will correspond or pass on the cache requirements and information as needed. If the search domain or machine does not exist or cannot be contacted, the DNS server responsible for this information will send the answer back and state that the search for DNS cannot solve the resolution request.
DNS search is often used with network tools, e -mail tools, during search on the web and network security. Finding DNS is an integral part of the concept of user -friendliness that helps people can easily use Internet using names for resources instead of unintelligible IP addresses. Finding DNS works in the background, so it also helps ensure easy use of hiding technical details of networks.