The Net_DNS_Packet class provides methods for creating a DNS packet suitable for sending to a nameserver. It also provides the methods of parsing a response from a nameserver into a Net_DNS_Packet object.
A standard DNS packet is made up of five main pieces:
Net_DNS defines the DNS packet header as a Net_DNS_Header object. Net_DNS_Question defines the question section of a packet object. The remaining three sections should be arrays of Net_DNS_RR objects.