問題文
A telecom exposes a subscriber lookup API to twenty partners. Three premium partners have paid for a higher call volume than the others, and the commercial team wants the platform to hold each partner to the volume that partner bought. Which approach enforces that?
選択肢
- Define tiers with the agreed limits, have each partner application register against a tier, and apply an address-based policy that reads the tier so that the limit follows the calling network
- Define tiers that carry the agreed limits, have each partner application register against one tier, and apply a rate-limiting policy that reads the tier so that the bought limit follows the calling application
- Apply one rate-limiting policy per partner on separate API instances, and route each partner to its own instance so that it meets the limit it bought
- Apply one rate-limiting policy with the highest agreed limit, and ask the seventeen standard partners to keep their own call volume inside the figure they bought