問題文
A university's marketing form starts receiving dozens of submissions an hour with nonsense names and disposable addresses. An admin asks what protection the hosted form already has before anything is switched on. What is built into every hosted form?
選択肢
- A honeypot field that stays invisible to people, so a submission is rejected when that field arrives with a value in it.
- An address verification step that stays visible to people, so a submission is rejected when the domain arrives without a mail server behind it.
- A reCAPTCHA widget that stays visible to people, so a submission is rejected when that widget arrives without a value in it.
- A submission throttle that stays invisible to people, so a submission is rejected when the same address arrives more than once in an hour.