What is the difference between Master, Slave and Secondary DNS?


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Hi.

Can't understand the difference, where you store the zone files?
Who responds to DNS requests if the Master "fell"?
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Should be considered a ligament)Master & Slave; b)Secondary & primary separately
a) Master — it can be created and managed DNS records, and Slave already pulls them master these concepts from the point of view of the server settings themselves
b) Primary and Secondary should be considered from the point of view determine the order for domain registration, a NS primary, some secondary, some tertiary, etc. In some areas the order is not relevant and Primary and Secondary blurred.
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At the same time, Secondary (as well as Primary) can be the domain Master (i.e., changes are made directly on it) and Slave (to pull information from the master).
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Between Master and Slave from the point of view of the client does not make any difference. It's only "mezhdusoboynyh" concept.
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Master — primary. Secondary (slave) secondary, kind of spare.
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Zone files are stored and edited primary, secondary, periodically uploads them yourself. If the primary has fallen, for it is secondary.
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\rHere.
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