Domain Name Elements

You may redirect your DNS using the different record types which make up a domain. Which to use depends on the information you’re trying to enter. You can set up A, AAAA, CNAME, SRV, NS, TXT, MX, MXE, and URL redirect records.
• An A Record directs your domain name to an individual server through its IP address. Each domain name has a primary A record, the information held within the A record controls what your domain name does when someone visitors your website. An A record (Address record) allows you to associate a domain name or subdomain with an IP address (32-bit).
• An AAAA record works a similarly to an A record except it lets you direct your domain to a 128-bit Ipv6 address.
• The CNAME is used to redirect your domain or subdomain to the IP address of the destination hostname. This record identifies a domain name as an alias of another name. The benefit is, if the IP of the destination hostname changes, you won’t need to update your DNS records because the CNAME will have the same IP.
• An MX Record is used to direct mail to the appropriate mail server. MX records must point to a hostname and never directly to an IP address.
• The NS Record lets you delegate a subdomain to a nameserver associated with the domain. This is helpful if your subdomain is hosted separately from the domain name.
Read More
How DNS Works
How is the DNS Organized?
How are Domains Mapped to IP Addresses
DNS Configuration
DNS Hosting
DNS Propagation
DNS Privacy Protection