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Discussion on: What is DNS? What happens after you click facebook.com?

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digdugprophetie profile image
ادريس م

Would add that DNS uses UDP in general, but requires TCP to be open for certain transactions- notably when requests return large responses. Network admins only opening UDP53 toward the server can end up with user complaints that DNS fails intermittently.

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mayankjoshi profile image
mayank joshi Author

Thank you for such a great insight.

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