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Following are the major differences between a forward lookup and a reverse lookup in DNS:
Forward DNS lookup Reverse DNS lookup
Converts a human input or a domain name to an IP address Converts an IP address into a domain name
Has a mapping between hostnames and IP addresses Has a mapping that relates IP addresses to hostnames
Used for a website or other server access Used for network troubleshooting
Utilizes different servers with different IP addresses Resolves reverse lookup queries where a client requests a hostname by providing an IP address
Uses A Records (basic) to identify any IP address for a particular hostname Uses DNS pointer record to identify a hostname for a given IP address