From the course: Deploying and Configuring Core TCP/IP Services
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How DNS works - Windows Server Tutorial
From the course: Deploying and Configuring Core TCP/IP Services
How DNS works
- [Instructor] The function of DNS is to resolve queries from clients and DNS servers, generally to resolve host names to IP addresses. There are three query types, recursive, iterative and nonrecursive. In a recursive query, the DNS server takes full responsibility for resolving a query it receives from a TCPIP based client or a server. If the DNS server has the information cached, it resolves it immediately and sends the information back to the requester. If it does not have the required information, it sends the query on to other servers that might. An iterative query occurs when a DNS has to forward a recursive query. These iterative queries are sent to other DNS servers on the network and those servers respond with whatever information they have. The server that answered the original recursive query looks at the information it receives, assembles it and then returns the result to the requester. Normally the DNS…
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