Understand the difference between recursive and non recursive queries when querying the D..
Explanation of the difference between authoritative and non-authoritative DNS server ..
Detailed explanation of the messages format of DNS..
Detailed explanation of the other sections in response of DNS server – additional and authorit..
Detailed explanation of the DNSBL (DNS-based Blackhole List), therefore the method of recording of potentially dangerous or malicious IP addresses in DNS especially aga..
Detailed explanation of the method of protection against spam by using SPF (Sender Policy F..
Information about DNS SRV record type that is used for putting servers for procure certain services for domain. For example, the routing of telephone calls by SIP..
Information about DNS record type NS, which delegating a subdomain to another D..
Information about settings of MX records for domain. MX record specifies where to deliver e-mail f..
Information about the DNS record of the CNAME is used to set an alias for another do..