A “NS” record or Name Server record identifies an authoritative DNS server for a specific zone.
UKC
What is an MX record?
“MX” (Mail Exchange) records are used to specify what server on the Internet is running e-mail software that is configured to handle e-mail for your domain. If you want your ISP to handle routing the e-mail for your domain to you, you need to specify the domain name or IP address of your ISP’s mail server.
In addition, you can specify the rank of each mail server when you have more than one. Make sure your ISP knows that you’re using their servers to route your domain’s email, or all your e-mail will “return to sender”!
What is a CNAME record?
“CNAME” records, short for “Canonical Name”, create an alias from a domain name to another. You could create an alias from “yahoo.mydomain.com” to “www.yahoo.com”, and every reference to “yahoo.mydomain.com” would go to the other location, regardless how yahoo changed their IP addresses!
Be careful, however; CNAMEs won’t work everywhere. If you create an MX record, and the name used for the mail server was defined using a CNAME, you might lose e-mail.
What is an AAAA Record?
Whereas an “A” record is used for IPv4 addresses, an “AAAA” record ties a domain name to an IPv6 address in the same manner.
What is an A record?
An “A” record, also called an “address” record, ties a domain name to an IP address. If there is a server on the Internet that is configured to handle traffic for this domain, you can enter the name of the domain (like “www.uk-cheapest.co.uk”) and the IP address of the server (like “84.67.12.9”), and almost immediately, anyone surfing to that domain connects to the correct server.