DNS Resource Record Types
Explore the key DNS resource record types including NS, SOA, MX, A, AAAA, and CNAME. Understand their roles in domain naming, mail delivery, web server addressing, and domain aliasing to better manage scalable web applications on AWS.
We'll cover the following...
The DNS uses resource records to describe properties of domains in the DNS system. Because there are multiple services and protocols used on the internet, we also need different types of resource records (we already saw the A and NS types in the last lesson).
The following fields are common for all resource records:
Common Resource Record Fields
Field | Meaning |
| The |
|
|
| This is the class of the record. There are only two options, |
| This is the type of the record (e.g., |
| The |
If we take a look at the output of one of our dig commands from the last lesson, we can see these fields reflected in the ANSWER, AUTHORITY or ADDITIONAL section:
Let’s take a look at the most important types of resource records.