What are the resource records in DNS?

A resource record, commonly referred to as an RR, is the unit of information entry in DNS zone files; RRs are the basic building blocks of host-name and IP information and are used to resolve all DNS queries. Resource records exist as many types to provide extended name-resolution services.

• A Record: Maps a host name to an IP address. When a computer has multiple adapter cards and IP addresses, it should have multiple address records.
• CNAME (Canonical Name) : Sets an alias for a host name. For example, using this record, abc.windowstechno.com can have an alias as www.windowstechno.com.
• MX (Mail Exchange): Specifies a mail exchange server for the domain, which allows mail to be delivered to the correct mail servers in the domain.
• NS (Name Server): Specifies a name server for the domain, which allows DNS lookups within various zones. Each primary and secondary name server should be declared through this record.
• PTR (Pointer):Creates a pointer that maps an IP address to a host name for reverse lookups.
• SOA (Start of Authority): Declares the host that is the most authoritative for the zone and, as such, is the best source of DNS information for the zone. Each zone file must have an SOA record (which is created automatically when you add a zone).

So, that’s all in this blog. I will meet you soon with some other stuff. Have a nice day !!!

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