Record Set
Overview
A record set is a collection of resource records that belong to the same domain name. A record set defines DNS record types and values.
If you have created a zone on the DNS console, you can create record sets to expand the domain name or record its detailed information.
Table 1 describes the record set types and their application scenarios.
Type |
Where to Use |
Description |
---|---|---|
A |
Public and private zones |
Maps domains to IPv4 addresses. |
CNAME |
Public and private zones |
Maps one domain name to another domain name or multiple domain names to one domain name. |
MX |
Public and private zones |
Maps domain names to email servers. |
AAAA |
Public and private zones |
Maps domain names to IPv6 addresses. |
TXT |
Public and private zones |
TXT record sets are usually used to record the following:
|
SRV |
Public and private zones |
Records servers providing specific services. |
NS |
Public and private zones |
Delegates subdomains to other name servers.
|
SOA |
Public and private zones |
Identifies the base information about a domain name. The SOA record set is automatically generated by the DNS service and cannot be added manually. |
CAA |
Public zone |
Grants certificate issuing permissions to CAs. CAA record sets can prevent the issuance of unauthorized HTTPS certificates. |
PTR |
Public and private zones |
Maps IP addresses to domain names. |
Usage
Record sets are used in following scenarios:
- Routing Internet traffic to a website
A and AAAA record sets are usually used to map domain names used by websites to IPv4 or IPv6 addresses of web servers where the websites are deployed.
Figure 1 Accessing a website over the Internet using domain name
- Private domain name resolution
On a private network, A and AAAA record sets translate private domain names into private IP addresses.
Figure 2 Private domain name resolution
- Email domain name resolution
MX, CNAME, and TXT record sets are usually used for email services.
Figure 3 Email domain name resolution
- Reverse resolution on a private network
PTR records translate private IP addresses into private domain names.
Figure 4 Reverse resolution on a private network
Helpful Links
For details about how to add and manage record sets, see Record Set.
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