CNAME (Canonical Name): This record type maps an alias name (such as a subdomain like www) to a true or canonical domain name. It essentially allows a domain to point to another hostname.

NS (Name Server): This record delegates a DNS zone to use specific authoritative name servers. It indicates which servers are responsible for the DNS information of that domain.

MX (Mail Exchange): This record directs email messages to the specified mail servers responsible for accepting email on behalf of a domain.

SOA (Start of Authority): This record is mandatory in all zone files. It identifies the primary name server for the zone and contains administrative details like the domain administrator's email, serial number, and refresh timers.

Mockapetris, P. (1987). RFC 1035: Domain Names - Implementation and Specification. Internet Engineering Task Force (IETF).

Section 3.3.1 (CNAME RDATA format): Defines CNAME as the canonical name for an alias.

Section 3.3.9 (MX RDATA format): Defines MX as a mail exchange for the domain.

Section 3.3.11 (NS RDATA format): Defines NS as the authoritative name server for the domain.

Section 3.3.13 (SOA RDATA format): Defines SOA as the start of a zone of authority.

DOI: 10.17487/RFC1035

HPE Aruba Networking. ArubaOS 8.x User Guide.

Chapter: IP Services - DNS: While ArubaOS documentation details the implementation of DNS on controllers, it relies on the standard IETF definitions (RFC 1035) for record types like SOA, NS, and MX utilized in network configurations.