3. Which of the following statements about DNS name and address resolution are
correct? (Choose all that apply.)
a. The DNS distributed database is indexed by both names and IP addresses.
b. The top-level domain in-addr.arpa is used for both forward and reverse que-
ries.
c. In the in-addr.arpa domain, the order of the IP address octets is reversed.
d. Troubleshooting tools, such as the nslookup command-line tool, use reverse
lookup queries to report back host names.
The correct answers are C and D. A is not correct because the DNS database is indexed byname, not by IP address. B is not correct because the top-level domain in-addr.arpa is used forreverse lookup queries, but not for forward lookup queries.Lesson 4 Review
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