DNS topology for large enterprises

For IT professionals, understanding DNS queries and the types of name server takes us most of the way to organizational DNS best practices:

• Network topology: Redundancy plays a critical role in domain infrastructure. Even if one server fails, another takes control to keep the service up and running. BIND (widely used DNS software) supports high redundancy through a master-slave relationship. The master NS updates the change in mapping to one or more slave servers through the zone transfer mechanism.
• Configuration files: BIND's configuration is storedin a file callednamed.conf. This named.conf file helps the server to recognize the authoritative and/or caching server and whether it is the master or slave for any specific zone. The file points to zone files that contain the real mapping database. It contains lines or records that define name-to-address and address-to-name mapping for a specific domain.

Architecture

With the changing technology and network transformation...