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Chapter 18. DNS > Answers to the Review Questions - Pg. 418

418 Hands-on Guide to the Red Hat ® Exams: RHCSA TM and RHCE ® Cert Guide and Lab Manual 7. What port must be opened on the firewall for DNS? 8. What does the rdnc-confgen command do? 9. What port does the rndc utility listen on by default? Answers to the Review Questions 1. The four types of DNS servers are master, slave, caching-only, and forwarding. 2. An A record translates translated hostnames to IP addresses, and a PTR record works the other way around. 3. False. A slave DNS server provides load balancing and redundancy benefits. 4. The rndc utility provides a method for managing the DNS server remotely and securely. 5. service named configtest