This is the MCQs in Domain Name System from book the Data Communications and Networking 4th Edition by Behrouz A. Forouzan. If you are looking for a reviewer in Electronics Systems and Technologies (Communications Engineering) this will definitely help you before taking the Board Exam.
Topic Outline
- NAME SPACE
- DOMAIN NAME SPACE
- DISTRIBUTION OF NAME SPACE
- Hierarchy of Name Servers
- Zone
- Root Server
- Primary and Secondary Servers
- DNS IN THE INTERNET
- Generic Domains
- Country Domains
- Inverse Domain
- RESOLUTION
- Resolver
- Mapping Names to Addresses
- Mapping Address to Names
- Recursive Resolution
- Iterative Resolution
- Caching
- DNS MESSAGES
- TYPES OF RECORDS
- REGISTRARS
- DYNAMIC DOMAIN NAME SYSTEM (DDNS)
- ENCAPSULATION
Begin and Good luck!
Choose the letter of the best answer in each questions.
1. A full domain name is a sequence of labels separated by ________.
- A) semicolons
- B) dots
- C) colons
- D) none of the above
2. A ________ server loads all information from the primary server.
- A) primary
- B) secondary
- C) zone
- D) none of the above
3. The first level in the generic domains section allows ______ possible labels.
- A) 10
- B) 12
- C) 16
- D) none of the above
4. If a label is not terminated by a null string, it is called a __________.
- A) PQDN
- B) FQDN
- C) SQDN
- D) none of the above
5. What a server is responsible for or has authority over is called a _________.
- A) domain
- B) label
- C) zone
- D) none of the above
6. DNS can use the services of ________ using the well-known port 53.
- A) UDP
- B) TCP
- C) either (a) or (b)
- D) none of the above
7. In the domain name chal.atc.fhda.edu, _______ is the most specific label.
- A) chal
- B) atc
- C) fhda
- D) none of the above
8. The root of the DNS tree is _______.
- A) a string of characters
- B) a string of 63 characters
- C) an empty string
- D) none of the above
9. When the secondary downloads information from the primary, it is called ______ transfer.
- A) domain
- B) zone
- C) label
- D) none of the above
10. A _______ is a server whose zone consists of the whole tree.
- A) domain server
- B) zone server
- C) root server
- D) none of the above
11. A pointer query involves the _______ domain.
- A) inverse
- B) reverse
- C) root
- D) none of the above
12. Each node in the tree has a _______, which is a string with a maximum of ___ characters.
- A) label; 127
- B) name; 255
- C) label; 63
- D) none of the above
13. To have a hierarchical name space, a ______________ was designed.
- A) domain space
- B) domain name
- C) domain name space
- D) none of the above
14. The _______ domains define registered hosts according to their generic behavior.
- A) generic
- B) country
- C) inverse
- D) none of the above
15. In a _________name space, each name is made of several parts.
- A) flat
- B) hierarchical
- C) organized
- D) none of the above
16. In a _______ name space, a name is assigned to an address. A name in this space is a sequence of characters without structure.
- A) flat
- B) hierarchical
- C) organized
- D) Connection-Oriented
17. The _________ domain is used to map an address to a name.
- A) generic
- B) country
- C) inverse
- D) none of the above
18. The ____________ domain section uses two-character country abbreviations.
- A) generic
- B) country
- C) inverse
- D) Bandwidth
19. A _________ is a subtree of the domain name space.
- A) label
- B) name
- C) domain
- D) none of the above
20. In the DNS, the names are defined in ___________ structure.
- A) a linear list
- B) an inverted-tree
- C) a graph
- D) none of the above
21. If a label is terminated by a null string, it is called a __________.
- A) PQDN
- B) FQDN
- C) SQDN
- D) none of the above
22. In the Internet, the domain name space (tree) is divided into _______ different sections:
- A) three
- B) two
- C) four
- D) none of the above
23. In __________ resolution, the server returns the IP address of the server that it thinks can resolve the query.
- A) iterative
- B) recursive
- C) straight
- D) none of the above
24. In the domain name chal.atc.fhda.edu, _______ is the least specific label.
- A) chal
- B) atc
- C) edu
- D) none of the above
25. A host with the domain name pit.arc.nasa.gov. is on the _______ level of the DNS hierarchical tree. (The root is level one.)
- A) third
- B) fourth
- C) fifth
- D) none of the above
26. In __________ resolution, the resolver expects the server to supply the final answer.
- A) iterative
- B) recursive
- C) straight
- D) none of the above
27. A ________ server loads all information from the disk file.
- A) primary
- B) secondary
- C) zone
- D) none of the above
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