What a webmaster needs to know about DNS and domains

What a webmaster needs to know about DNS and domains

What is DNS? When to update DNS records. How to get started quickly with a new domain. Types of DNS records. How to set up automatic subdomains. Fix redirection to address without www at the beginning.

What is DNS?

The Internet is a network that connects millions of computers around the world. Some of the computers on this network are on 24 hours a day, they are servers with websites and email. Click here for more details https://www.tipsyoumustknow.com/ . Each computer, when connected to the Internet, is given a numerical identifier - an IP address. But it is not practical for people to access servers by a numerical identifier, so letter domains were introduced. DNS (Domain Name System) is a system that ensures that domains are mapped to IP addresses. A separate class of servers, the naked servers, is responsible for storing DNS records on the Internet. Some of these are supported by domain zone administrators, while others are supported by web hosts and Internet providers. These servers have their own hierarchy and the records on the servers are not updated immediately: on some very quickly, on others in a few days. The most popular DNS server software is called BIND.

Updating DNS records

A common question for beginners is when a new domain will start working. So, you want the new domain to be up and running. To do this, you need to add records to the DNS and wait for them to propagate across the Internet. The time it takes to update records varies from several hours to three days. The limitations are caused by the principles of the DNS, which is a distributed and highly loaded system. After registering a domain or changing DNS records, your site will be available to different users at different times, depending on the specifics of their Internet providers. This is due to the fact that each ISP determines the time of the DNS cache update on its servers.

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