![]() ![]() Multi CDN - routing users to the CDN that will provide the best experience.Global server load balancing (GSLB) - fast routing of connections between globally distributed data centers.Next-generation DNS services such as NS1, which provide advanced traffic routing capabilities, have created new uses for DNS: If you own or manage any of the above - for example if you own a website or allow VPN access to your company’s network - you will need to setup DNS in order to allow users to access to your service.ĭNS has evolved over the past 20 years. If you use any of the above services, you will probably use DNS to communicate with it. Communication between IoT devices, gateways and servers.Instant messaging and online meeting services.Connecting app servers, databases and middleware within a web application.Routing messages to email servers and webmail services.Resolving names of World Wide Web (WWW) sites.But DNS has many more uses - it underlies many other forms of Internet communication. The classic use of DNS is to translate the domain name in a URL into a corresponding IP address. The process is known as DNS resolution of a hostname to IP address. If everything is working well, this can take less than a second. These are the initial DNS servers your device will use to translate host names to IP addresses.Ī component called a DNS Resolver is responsible for checking if the host name is available in local cache, and if not, contacts a series of DNS Name Servers, until eventually it receives the IP of the website or service you are trying to reach. Typically, when you connect to a local network, Internet service provider (ISP) or WiFi network, the modem or router sends network configuration information to your local device, including one or more DNS servers. A single hostname can also resolve to many IP addresses, in order to distribute load to multiple servers. With next-generation DNS technology propagation can be reduced to minutes or seconds.ĭNS allows for multiple hostnames to correspond to a single IP address - this can be used for virtual hosting, when many websites are served from a single host. This period is referred to as propagation. ![]() A DNS A or AAAA Record points a domain or subdomain to an IP, and a CNAME record points a domain or subdomain to another domain name.Īfter you register a new domain name or when you update DNS servers on your domain name, it usually takes about 12-36 hours for the domain name servers world-wide to be updated and able to access the information. Users continue to use the same domain name, and are automatically redirected to the new address. Unlike a phone book, DNS records are commonly updated, meaning that a server’s IP address can change without affecting end users. Without DNS, the Internet would collapse - it would be impossible for people and machines to access Internet servers via the friendly URLs they have come to know.įor example, the domain name you are viewing now, translates to the IP address 104.20.48.182 (in the old IPv4 format) or 2002:6814:30b6:0:0:0:0:0 (in the newer IPv6 format). ![]() Like a phonebook which lets you look up the name of a person and discover their number, DNS lets you type the address of a website and automatically discover the Internet Protocol (IP) address for that website. Domain Name Server (DNS) is a standard protocol that helps Internet users discover websites using human readable addresses. ![]()
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