During a recent security assessment, you discover the organization has one Domain Name Server (DNS) in a Demilitarized Zone (DMZ) and a second DNS server on the internal network. What is this type of DNS configuration commonly called?
In a split DNS infrastructure, you create two zones for the same domain, one to be used by the internal network, the other used by the external network. Split DNS directs internal hosts to an internal domain name server for name resolution and external hosts are directed to an external domain name server for name resolution.
References: http://www.webopedia.com/TERM/S/split_DNS.html
DNSSEC strengthens authentication in DNS using digital signatures based on public key cryptography. With DNSSEC , it's not DNS queries and responses themselves that are cryptographically signed, but rather DNS data itself is signed by the owner of the data
Dynamic DNS (DDNS or DynDNS) is a mechanism by which the name server in the Domain Name System (DNS) is automatically updated with the custom domain name and the ever-changing IP addresses
Split Domain Name System (Split DNS) is an implementation in which separate DNS servers are provided for internal and external networks as a means of security and privacy management.
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