What is Rate Limiting?
Rate limiting caps how many requests a client can make in a time window, throttling clients that exceed the allowance.
How it works
Limits can apply per IP, per account, per session, or per fingerprint. Sophisticated attackers spread load across thousands of identities to stay under each cap.
Why it matters for online assessment
It slows bulk abuse but is blind on its own; distributed botnets treat simple rate limits as a speed bump, not a wall. For your assessments, that means the value of your scores stay protected and candidates get a fair experience.
How ExamFence detects it
ExamFence scores every request against behavioral, network, and device signals, so automated patterns surface even when they imitate real candidates. Suspicious sessions get challenged or blocked before they reach your assessments.