What is the purpose of maintaining two separate DNS servers, one internal to the organization, and one external for customers?

What is the purpose of maintaining two separate DNS servers, one internal to the organization, and one external for customers?  Explain recursive versus authoritative DNS servers and the potential issue with maintaining your corporate DNS server outside the organization? 

Please DO NOT USE outside sources or quote your book directly for these discussion – summarize what you want to say in your own words and use examples to illustrate your meaning.  This will allow me to gage how well you understand the concepts.  I want you to think not just memorize.

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Discussion Forum: Course Reflection

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