The city's DNA Center consumer receives HTTP 429 with a Retry-After value of 30 seconds. What is the robust client action before the next attempt?
Select an answer to reveal the explanation.
Short Explanation
Retry-After is the desk clerk saying 'come back in thirty seconds.' Sleep that long—or longer—then try again. Ignoring the sign and jumping the line makes the limit worse.
Full Explanation
A 429 with Retry-After (delta-seconds or HTTP-date) tells the consumer when another attempt is allowed. Honoring that wait is correct robust rate-limit handling. Immediate repeats, treating 429 as a permission failure, or inventing non-HTTP transports are not robust control flow.