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  1. Recursive Query - When a DNS Client submits a Query to a DNS Server for name resolution. The response to the DNS Query might be either an answer to the query or an error message. In Recursive Query, if the DNS Server does not have the reply to offer an exact response to the DNS Client, the DNS Server may query other DNS Servers on behalf of the DNS Client.
  2. Iterative Query - When a DNS Client requests name resolution from the DNS server, the DNS Server returns the best reply it has. If the DNS Server does not recognize the response to the Client's DNS Query, the answer might also be a referral to another lower level DNS Server. This lower level DNS Server is designated by the higher level DNS Server as the Authoritative DNS Server for the DNS namespace with which the DNS Query is associated. Once the DNS Client receives the referral from the higher level DNS server, it may send a DNS query to the lower level DNS server that received the recommendation.

The two major types of DNS request are as follows;

  • Recursive Query
  • Iterative Query

What is a domain name system?

Domain name system is abbreviated as DNS.

A Domain Name System (DNS) converts domain names into IP addresses, which allow browsers to get to websites and other internet resources.

Basically,  DNS is a directory of names that match with numbers.

Computer uses IP addresses to communicate, therefore, the DNS convert domain names to IP address for communication.  

The two major types of DNS request are as follows;

  • Recursive Query - Query that demands a resolution
  • Iterative Query - Query that does not demand a resolution.

learn more on DNS here: https://brainly.com/question/14397200

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