Forward Vs reverse lookup zone Iterative Vs recursive query Resolver Primary Vs secondary server Stubs zone Vs forwarders Caching the only server Root hints

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This question covers various DNS concepts such as forward/reverse lookup zones, iterative/recursive queries, primary/secondary servers, stubs zone/forwarders, caching, and root hints.

Forward lookup zone maps hostnames to IP addresses while reverse lookup zone maps IP addresses to hostnames
Iterative query requires the DNS server to provide the best answer it can while recursive query requires the DNS server to provide a complete answer
Primary server holds the master copy of the zone while secondary server holds a copy of the zone that is synchronized with the primary server
Stubs zone contains a list of name servers for a specific zone while forwarders forward DNS queries to another DNS server
Caching server stores DNS query results for a period of time to reduce network traffic
Root hints are a list of IP addresses for the root DNS servers

Forward Vs reverse lookup zone Iterative Vs recursive query Resolver Primary Vs secondary server Stubs zone Vs forwarders Caching the only server Root hints

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