Let's Encrypt quiz

Test your Let's Encrypt knowledge with a free interactive quiz — 39 questions with answers and explanations. No signup needed to play.

Which challenge type is required to issue a wildcard certificate?

1. Which challenge type is required to issue a wildcard certificate?
2. What is an ACME account key used for?
3. Why does Let's Encrypt deliberately use a short 90-day certificate lifetime instead of a longer one like traditional CAs offered?
4. What protocol does Let's Encrypt use to automate certificate issuance?
5. What is a common ACME client used with Let's Encrypt?
6. Are Let's Encrypt certificates trusted by browsers by default?
7. What is a common pitfall when automating renewal for a domain using DNS-01 through an API-driven DNS provider?
8. Does Let's Encrypt validate the legal identity of the organization behind a domain?
9. What is the HTTP-01 challenge?
10. How long are Let's Encrypt certificates valid?
11. What type of validation does Let's Encrypt perform before issuing a certificate?
12. What does the command `certbot renew` do?

More quizzes