In this chapter, we have examined how to install and configure a DNS server. Since DNS is a complex topic, you should read the man pages for the daemons utilized for DNS services.
1. | Which of the following is a fully qualified domain name ?
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2. | Which of the following is a valid /etc/ hosts entry?
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3. | Which of the following is defined in named.root ?
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4. | Which of the following is defined in /etc/defaultdomain ?
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5. | What is the purpose of nslookup ?
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6. | What fields can be found in the SOA record?
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7. | What command can be used to resolve IP addresses on the command line?
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8. | What is the purpose of the server statement in an SOA record?
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9. | What is the main requirement of the zone record?
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10. | What is the role of the options statement?
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Answers
1. | C. Qualified domain names must have a hostname and a domain name. |
2. | B. IP addresses must map to hostnames. |
3. | A. The named.root file always contains the root name server data. |
4. | D. The defaultdomain defines the local domain. |
5. | C. The nslookup command can resolve IP addresses and hostnames. |
6. | A. The origin, mail addr, serial, refresh, retry, expire, and minimum ttl fields can all be contained within an SOA record. |
7. | D. The nslookup command can resolve IP addresses as well as hostnames. |
8. | A. The server statement only defines the characteristics of remote name servers. |
9. | A . One zone record must be created for each network or subdomain that your DNS server manages. |
10. | B. The options statement sets key parameters that affect the runtime behavior of the BIND server. |