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# Forouzan: MCQ in Switching

This is the MCQ in Switching from the book Data Communications and Networking 4th Edition by Behrouz A. Forouzan. If you are looking for a reviewer in datacom, a topic in Electronics Systems and Technologies (Communications Engineering) this will definitely help you before taking the Board Exam.In this particular topic you have learned the three fundamental switching methods: circuit switching, packet switching, and message switching. If you skip the summary visit Switching which is a method in which communication devices are connected to one another efficiently.
Watch Audio MCQ in Switching

#### Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. Packet-switched networks can also be divided into _________ subcategories: virtual-circuit networks and datagram networks.

A)ย ย  five

B)ย ย  three

C)ย ย  two

D)ย ย  four

Solution:

2. In __________, each packet is treated independently of all others.

A)ย ย  circuit switching

B)ย ย  datagram switching

C)ย ย  frame switching

D)ย ย  none of the above

Solution:

3. Based on the Clos criteria, if N = 200, then k must be equal to or greater than _________.

A)ย ย  19

B)ย ย  21

C)ย ย  31

D)ย ย  41

Solution:

4. In _________, resources are allocated on demand.

A)ย ย  circuit switching

B)ย ย  datagram switching

C)ย ย  frame switching

D)ย ย  none of the above

Solution:

5. In _______ switching, the paths in the circuit are separated from one another spatially.

A)ย ย  time-division

B)ย ย  two-dimensional

C)ย ย  space-division

D)ย ย  three-dimensional

Solution:

6. In a ________ network, two types of addressing are involved: global and local.

A)ย ย  datagram

B)ย ย  virtual-circuit

C)ย ย  circuit-switched

D)ย ย  none of the above

Solution:

7. In a three-stage space division switch, if N = 200, the number of crosspoints is ______.

A)ย ย  40,000

B)ย ย  less than 40,000

C)ย ย  greater than 40,000

D)ย ย  greater than 100,000

Solution:

8. A ________ network is made of a set of switches connected by physical links, in which each link is divided into n channels.

A)ย ย  circuit-switched

B)ย ย  line-switched

C)ย ย  frame-switched

D)ย ย  none of the above

Solution:

9. In a banyan switch, for 8 inputs and 8 outputs, we have _____ micro-switches at each stage.

A)ย ย  2

B)ย ย  3

C)ย ย  4

D)ย ย  8

Solution:

10. In _________, there is no resource allocation for a packet.

A)ย ย  circuit switching

B)ย ย  datagram switching

C)ย ย  frame switching

D)ย ย  none of the above

Solution:

11. A _________ network is a cross between a circuit-switched network and a datagram network. It has some characteristics of both.

A)ย ย  packet-switched

B)ย ย  frame-switched

C)ย ย  virtual-circuit

D)ย ย  none of the above

Solution:

12. The most popular technology in time-division switching is called the _________.

A)ย ย  TSI

B)ย ย  STI

C)ย ย  ITS

D)ย ย  none of the above

Solution:

13. A switched WAN is normally implemented as a _______ network.

A)ย ย  virtual-circuit

B)ย ย  datagram

C)ย ย  circuit-switched

D)ย ย  none of the above

Solution:

14. We can say that a packet switch has _______ types of components.

A)ย ย  four

B)ย ย  three

C)ย ย  two

D)ย ย  none of the above

Solution:

15. In a one-stage space division switch, if N = 200, the number of crosspoints is ______.

A)ย ย  20,000

B)ย ย  40,000

C)ย ย  30,000

D)ย ย  10,000

Solution:

16. In a banyan switch, for 8 inputs and 8 outputs, we have _____ stages.

A)ย ย  2

B)ย ย  3

C)ย ย  4

D)ย ย  8

Solution:

17. A switch in a datagram network uses a routing table that is based on the ______ address.

A)ย ย  destination

B)ย ย  source

C)ย ย  local

D)ย ย  none of the above

Solution:

18. Traditionally, _____ methods of switching have been important.

A)ย ย  six

B)ย ย  five

C)ย ย  four

D)ย ย  three

Solution:

19. The network layer in the Internet is designed as a __________ network.

A)ย ย  circuit-switched

B)ย ย  datagram

C)ย ย  virtual-circuit

D)ย ย  none of the above

Solution:

20. A ________ switch combines space-division and time-division technologies to take advantage of the best of both.

A)ย ย  SSS

B)ย ย  TST

C)ย ย  TTT

D)ย ย  none of the above

Solution:

21. In _______, the resources need to be reserved during the setup phase; the resources remain dedicated for the entire duration of data transfer phase until the teardown phase.

A)ย ย  frame switching

B)ย ย  datagram switching

C)ย ย  circuit switching

D)ย ย  none of the above

Solution:

22. Based on the Clos criteria, if N = 200, then n must be equal to or greater than ____.

A)ย ย  40

B)ย ย  30

C)ย ย  20

D)ย ย  10

Solution:

23. Circuit switching takes place at the ________ layer.

A)ย ย  physical

B)ย ย  data line

C)ย ย  network

D)ย ย  transport

Solution:

24. A ________ switch combines crossbar switches in several (normally three) stages.

A)ย ย  multiple path

B)ย ย  multiple crossbar

C)ย ย  multistage

D)ย ย  none of the above

Solution:

25. In _______ there are no setup or teardown phases.

A)ย ย  circuit switching

B)ย ย  datagram switching

C)ย ย  frame switching

D)ย ย  none of the above

Solution:

26. We can divide today’s networks into ____ broad categories.

A)ย ย  five

B)ย ย  four

C)ย ย  three

D)ย ย  two

Solution:

27. A ________ switch is a multistage switch with microswitches at each stage that route the packets based on the output port represented as a binary string.

A)ย ย  TSI

B)ย ย  banyan

C)ย ย  crossbar

D)ย ย  none of the above

Solution:

28. The _______ address in the header of a packet in a datagram network normally remains the same during the entire journey of the packet.

A)ย ย  destination

B)ย ย  source

C)ย ย  local

D)ย ย  none of the above

Solution:

29. Based on the Clos criteria, if N = 200, then the minimum number of crosspoints is greater than or equal to _______.

A)ย ย  42,000

B)ย ย  20,000

C)ย ย  18,000

D)ย ย  15,200

Solution:

30. The simplest type of switching fabric is the ______ switch.

A)ย ย  crossbar

B)ย ย  crosspoint

C)ย ย  TSI

D)ย ย  STS

Solution:

### MCQ in Switching (pdf)

MCQ in Switching (pdf)

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