Advanced DNS: Terms Explained


The webhosting company usually provides you with the ability to update the DNS records, which allows you pointing your domain to somewhere else. Therefore it is necessary to understand the following terms.

Recently, I tried Amazon Web Service free-tier (aws.amazon.com) clouding computing (it is free for a year if you use micro-tier, which will give you 750 hours free up-time per month).

The server adddress is long and not easy to remember, in this case, all you have to do is to add a CNAME record in the control panel, pointing to this long address.

Explanations below taken from fasthosts control panel.

Glue Records

A Glue record (held by the domain name registry) is the IP address of a Nameserver.

Glue records are needed in order to use a domain name for its own Nameservers (e.g. ns1.yourdomain.com and ns2.yourdomain.com as the Nameservers for yourdomain.com).

What are Nameservers?

Internet Service Providers check your domain name to establish where its website and email are hosted on the internet. Nameservers translate a human-friendly web address into a computer-friendly address, guiding web browsers to the server hosting the website.

Each domain name needs at least two Nameservers. If one should fail or is busy, the other Nameserver will take over to keep your website online. We provide three Nameservers for added reliability.

Address (A) Records

An “A” record points a domain name to a web server IP address. If a web server has been set up to handle traffic for the domain, entering the domain name in a web browser will then connect to the correct web server.

AAAA Records

The AAAA record is a version of the A record for IPv6, the new generation of Internet Protocol introduced to cater for the diminishing number of unused IPv4 addresses.

Canonical Name (CNAME) Records

A CNAME record creates an alias from a domain name to another. For example, you could create an alias from “shop.mydomain.com” to “www.anotherdomain.com”.

Service (SRV) Records

Service (SRV) records allow you to specify the locations and port numbers of different services such as SIP and XMPP

Sender Policy Framework (SPF) Records

Sender Policy Framework (SPF) records can be used for preventing SPAM emails.

Text (TXT) Records

A TXT record can be used as an information record containing additional arbitrary text about the domain or host. They are also commonly used for data such as email Sender Policy Frameworks (SPF).

–EOF (The Ultimate Computing & Technology Blog) —

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