Discussion
State whether the following is true or false.
Deploying an application across two availability zones protects it from the failure of a single data centre.
Answer: B
Correct answer: True
That is precisely what availability zones are for: they are separate facilities with independent power, cooling and networking, close enough for low-latency synchronous replication and far enough apart that one failure does not take the other. Running in two of them protects against the loss of a single data centre - though not against a regional event, which is what multi-region deployment addresses.
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