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