Free DNS services can be obtained through several different companies. OpenDNS is one of the best websites to check for local availability. DNS offers a free trial of their low cost service. DNS Dynamic can be used as a backup when other providers are experiencing heavy traffic volumes.
"Having a free dns service provide you with an open domain name. This domain name service is not specifically tied to an internet service provider, As a result of this open access internet speeds can be faster."
OpenDNS is currently one of the most popular solutions. It's free, and exists independently of specific service providers and the conflicted interets which they'd bring.
The most reliable DNS would be any DNS system that built as a distributed or has a large, worldwide fail-over system built in. OpenDNS provides such service, free of charge.
Google Public DNS (Domain Name System) was announced on December 3rd 2009. The service is free and available in every country. According to Google in 2013, the DNS is the biggest in the world.
There is service used to automatically associate names with addresses. DNS that is domain name system is the one that provides that mapping . DNS assigns name to the IP addresses .
An automatic DNS Failover Service is used for to send traffic to a secondary IP address if one's main connection is not working. The DNS Failover Service regularly checks to make sure the main connection is working and if it finds a problem it diverts the traffic.
DNS
It is a service.
It is useful only in small environments. When you have only one DNS in organization and users mainly use internet (external DNS names) then you can configure in DHCP that users will obtain also external DNS server address as secon one. It will be used only when first DNS service won't be accessible. P.S.
BIND is the default package for Domain Name service(DNS) in Linux based systems, one of the widely used DNS servers across the internet.
If you are looking for free DNS hosting you can try Zonomi, as this is what they offer. They are a free managed DNS hosting server. It is ranked well with most consumers.