Query: is a request to find an address of the DNS
There are 2 types of queries:
1. Recursive Query: When a client start a query, it is passed onto local DNS for resolution, if it cannot find the solution then the DNS forwards the query to another DNS on behalf of client, until it finds the mapping information
2. Iterative Query: Query raised by the client to the DNS. If it cannot resolve it sends a negative response to the client, then the client has to contact another DNS and so on
There are 2 types of queries:
1. Recursive Query: When a client start a query, it is passed onto local DNS for resolution, if it cannot find the solution then the DNS forwards the query to another DNS on behalf of client, until it finds the mapping information
2. Iterative Query: Query raised by the client to the DNS. If it cannot resolve it sends a negative response to the client, then the client has to contact another DNS and so on