When they perform well, you won’t notice any delays in browsing or using online resources. Most often, your ISP will supply DNS names servers for your connection and assign them via DHCP (Dynamic Host Configuration Protocol).
Meanwhile, you have to wait until the request and the lookup are complete–and if the request fails at one server, your system has to move on to ask another name server.ĭNS name servers are essential intermediaries that link your system to virtually all of the resources scattered across the Internet. Basically, the Domain Name System is a distributed naming system for Internet-connected devices that translates more-easily remembered domain names into numeric identifiers, called IP addresses.įor example, when you enter (or just ) in your browser, your system responds by checking its DNS resolver if the requisite IP address isn’t already cached, your system sends a request to one or more DNS name servers until a server replies with the appropriate address–in this case, 70.42.185.10. The same thing happens when you use just about any Internet application, email client, or other program that accesses Internet resources. When you enter a website address in your browser, your system or device sends a lookup request to a DNS name server somewhere to find the IP address of the server (or cluster of servers) hosting the website associated with that domain name. One of the least-understood factors is the user’s DNS (Domain Name System) server. Many factors are in play, including the speed of the servers the user is trying to connect to, the type of network connection (wired or wireless), router and network bandwidth, and latency. Most people assume that their Internet connection’s peak bandwidth determines their broadband connection’s overall performance.
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