Rate limiting is the practice of restricting how frequently a user, client, or system can make requests within a given period. It matters because unrestricted request volume can enable abuse, credential attacks, scraping, or service degradation.
What is Rate Limiting?
Rate limiting sets rules around how many requests are allowed by a caller, IP, token, account, or endpoint over a defined time window. It is commonly used to protect APIs, login pages, administrative functions, and public-facing services from excessive or suspicious activity.
What Rate Limiting Commonly Helps Prevent
Common protections include defense against brute-force attempts, credential stuffing, scraping, bot abuse, denial-of-service amplification, and accidental overuse by integrations.
Rate Limiting vs. Total Access Blocking
Rate limiting slows or caps activity based on volume rules. Total blocking fully denies access instead of just constraining frequency.
Frequently Asked Questions
Why is rate limiting important?
Because some attacks rely on large numbers of repeated requests that become less practical when the request budget is constrained.
Can rate limiting hurt legitimate users?
Yes. Poorly tuned limits can disrupt valid traffic, which is why thresholds and exceptions need careful design.
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