This video is an intraduction to dns server
Key components of DNS.

· Domain Namespace (Structure of domain daterdace & Hierarchical Structure with several levels with the Root domain at the top of the tree)

· Zones ( dns administration configuration and database files)

· Name Servers (load balance secondary zone files, storing a duplicate of the zones data similar to a mirror)

Name resolution prosess.
Forward lookup Internet Protocol (IP) address mapping dns query.