The following are the types of resource records supported by ManageEngine CloudDNS:

1. A (IPv4): Address record that maps a domain name to an IPv4 address, allowing a domain to be associated with a physical machine or resource on an IPv4 network.

2. AAAA (IPv6): Address record similar to the A record but for IPv6 addresses, mapping a domain name to an IPv6 address.

3. ALIAS: Redirect your domain seamlessly using ALIAS records, which allow you to point your domain to another host name or subdomain, facilitating smooth transitions and management of your web presence.

4. ANAME (ALIAS Name Record): Point a domain or subdomain to another domain name, similar to a CNAME record. However, ANAME records can be used at the root level of a domain, which CNAME records cannot. When a DNS lookup is performed on a domain with an ANAME record, it resolves to the IP address of the target domain, essentially allowing for a CNAME-like functionality at the apex of the domain.

5. CAA (Certificate Authority Authorization): Specify which certificate authorities (CAs) are allowed to issue certificates for a domain using CAA records, enhancing security by restricting which particular CAs can issue certificates.

6. CNAME (Canonical Name): Redirect one domain name to another domain name, allowing multiple DNS records to map to the same server without specifying IP addresses.

7. DS (Delegation Signer): Holds the cryptographic signature for a DNSSEC-secured domain, which is used to securely delegate a subdomain to another DNS server or manager.

8. MX (Mail Exchange): Directs email to a mail server by specifying the server responsible for accepting email messages on behalf of a domain with a priority level.

9. NS (Name Server): Indicates the authoritative name server for a domain, which is responsible for presenting information about the domain's DNS zone.

10. PTR (Pointer): Used primarily for reverse DNS lookups, mapping an IP address (IPv4 or IPv6) to a domain name.

11. SPF (Sender Policy Framework): Defines which IP addresses are authorized to send email from a domain, helping to prevent email spoofing.

12. SRV (Service Locator): Specifies the location of servers for specified services, containing the hostname and port number for services such as VoIP, IM, etc.

13. TXT (Text): Allows administrators to insert arbitrary text into a DNS record. Often used to provide information to external sources, such as verification tokens for domain ownership or email security policies.
    
    Note: An SPF or TXT record is limited to 256 characters per string. For longer records, multiple strings can be concatenated in the DNS configuration.

14. System NS: Specify the servers that are authoritative for a particular domain with System NS or Name Server records.These records point to the domain's DNS servers, which hold the necessary records to direct traffic for the domain.

15. TLSA( Transport Layer Authentication): Enhance your domain's security posture by implementing a TLS Authentication (TLSA) record, which associates your domain name with a specific TLS server certificate or public key, ensuring secure and trusted connections.