This is the MCQs in Switching 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.
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.
Begin and Good luck!
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) five
- B) three
- C) two
- D) four
2. In __________, each packet is treated independently of all others.
- A) circuit switching
- B) datagram switching
- C) frame switching
- D) none of the above
3. Based on the Clos criteria, if N = 200, then k must be equal to or greater than ______.
- A) 19
- B) 21
- C) 31
- D) 41
4. In _________, resources are allocated on demand.
- A) circuit switching
- B) datagram switching
- C) frame switching
- D) none of the above
5. In _______ switching, the paths in the circuit are separated from one another spatially.
- A) time-division
- B) two-dimensional
- C) space-division
- D) three-dimensional
6. In a ________ network, two types of addressing are involved: global and local.
- A) datagram
- B) virtual-circuit
- C) circuit-switched
- D) none of the above
7. In a three-stage space division switch, if N = 200, the number of crosspoints is ______.
- A) 40,000
- B) less than 40,000
- C) greater than 40,000
- D) greater than 100,000
8. A ________ network is made of a set of switches connected by physical links, in which each link is divided into n channels.
- A) circuit-switched
- B) line-switched
- C) frame-switched
- D) none of the above
9. In a banyan switch, for 8 inputs and 8 outputs, we have _____ microswitches at each stage.
- A) 2
- B) 3
- C) 4
- D) 8
10. In _________, there is no resource allocation for a packet.
- A) circuit switching
- B) datagram switching
- C) frame switching
- D) none of the above
11. A _________ network is a cross between a circuit-switched network and a datagram network. It has some characteristics of both.
- A) packet-switched
- B) frame-switched
- C) virtual-circuit
- D) none of the above
12. The most popular technology in time-division switching is called the _________.
- A) TSI
- B) STI
- C) ITS
- D) none of the above
13. A switched WAN is normally implemented as a _______ network.
- A) virtual-circuit
- B) datagram
- C) circuit-switched
- D) none of the above
14. We can say that a packet switch has _______ types of components.
- A) four
- B) three
- C) two
- D) none of the above
15. In a one-stage space division switch, if N = 200, the number of crosspoints is ______.
- A) 20,000
- B) 40,000
- C) 30,000
- D) 10,000
16. In a banyan switch, for 8 inputs and 8 outputs, we have _____ stages.
- A) 2
- B) 3
- C) 4
- D) 8
17. A switch in a datagram network uses a routing table that is based on the ______ address.
- A) destination
- B) source
- C) local
- D) none of the above
18. Traditionally, _____ methods of switching have been important.
- A) six
- B) five
- C) four
- D) three
19. The network layer in the Internet is designed as a __________ network.
- A) circuit-switched
- B) datagram
- C) virtual-circuit
- D) none of the above
20. A ________ switch combines space-division and time-division technologies to take advantage of the best of both.
- A) SSS
- B) TST
- C) TTT
- D) none of the above
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) frame switching
- B) datagram switching
- C) circuit switching
- D) none of the above
22. Based on the Clos criteria, if N = 200, then n must be equal to or greater than ____.
- A) 40
- B) 30
- C) 20
- D) 10
23. Circuit switching takes place at the ________ layer.
- A) physical
- B) data line
- C) network
- D) transport
24. A ________ switch combines crossbar switches in several (normally three) stages.
- A) multiple path
- B) multiple crossbar
- C) multistage
- D) none of the above
25. In _______ there are no setup or teardown phases.
- A) circuit switching
- B) datagram switching
- C) frame switching
- D) none of the above
26. We can divide today's networks into ____ broad categories.
- A) five
- B) four
- C) three
- D) two
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) TSI
- B) banyan
- C) crossbar
- D) none of the above
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) destination
- B) source
- C) local
- D) none of the above
29. Based on the Clos criteria, if N = 200, then the minimum number of crosspoints is greater than or equal to _______.
- A) 42,000
- B) 20,000
- C) 18,000
- D) 15,200
30. The simplest type of switching fabric is the ______ switch.
- A) crossbar
- B) crosspoint
- C) TSI
- D) STS
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