DNS Cache and Propagation Issues Quiz

5 questions Pass: 70% +25 pts (50 with Pro)

Quiz covering DNS and VPN Issues

What you'll be asked

  1. Which command-line utility is most commonly used on Windows to clear the local DNS resolver cache when troubleshooting connectivity issues?
  2. After updating a DNS record for a domain, a user reports they still see the old IP address. What is the most likely reason for this discrepancy?
  3. When connected to a corporate VPN, a user cannot resolve internal hostnames, but public websites work fine. What is the most likely cause?
  4. You have updated a DNS A record with a very low TTL. Why might some users still experience issues reaching the new server for several hours after the update?
  5. Which tool is best suited to verify which specific DNS server is providing an authoritative response for a domain, helping to identify if a request is hitting a stale cache?

Answers and explanations come after you submit.