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1 | |
Traditionally, _____ methods of switching have been important. |
|
| | A) | four |
| | B) | three |
| | C) | five |
| | D) | six |
|
2 | |
We can divide today's networks into ____ broad categories. |
|
| | A) | four |
| | B) | three |
| | C) | five |
| | D) | two |
|
3 | |
Packet-switched networks can also be divided into ______subcategories: virtual-circuit networks and datagram networks |
|
| | A) | four |
| | B) | three |
| | C) | two |
| | D) | five |
|
4 | |
A ________ network is made of a set of switches connected by physical links, in which each link is divided into n channels. |
|
| | A) | line-switched |
| | B) | frame-switched |
| | C) | circuit-switched |
| | D) | none of the above |
|
5 | |
Circuit switching takes place at the ________ layer. |
|
| | A) | data line |
| | B) | physical |
| | C) | network |
| | D) | transport |
|
6 | |
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) | datagram switching |
| | B) | circuit switching |
| | C) | frame switching |
| | D) | none of the above |
|
7 | |
In _________, there is no resource allocation for a packet. |
|
| | A) | datagram switching |
| | B) | circuit switching |
| | C) | frame switching |
| | D) | none of the above |
|
8 | |
In _________, resources are allocated on demand. |
|
| | A) | datagram switching |
| | B) | circuit switching |
| | C) | frame switching |
| | D) | none of the above |
|
9 | |
In __________, each packet is treated independently of all others. |
|
| | A) | datagram switching |
| | B) | circuit switching |
| | C) | frame switching |
| | D) | none of the above |
|
10 | |
In _______ there are no setup or teardown phases. |
|
| | A) | datagram switching |
| | B) | circuit 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) | virtual-circuit |
| | B) | packet-switched |
| | C) | frame-switched |
| | D) | none of the above |
|
12 | |
We can say that a packet switch has _______ types of components. |
|
| | A) | two |
| | B) | three |
| | C) | four |
| | D) | none of the above |
|
13 | |
The simplest type of switching fabric is the ______ switch. |
|
| | A) | crosspoint |
| | B) | crossbar |
| | C) | TSI |
| | D) | STS |
|
14 | |
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) | crossbar |
| | B) | TSI |
| | C) | banyan |
| | D) | none of the above |
|
15 | |
In a banyan switch, for 8 inputs and 8 outputs, we have _____ stages. |
|
| | A) | 8 |
| | B) | 4 |
| | C) | 3 |
| | D) | 2 |
|
16 | |
In a banyan switch, for 8 inputs and 8 outputs, we have _____ microswitches at each stage. |
|
| | A) | 8 |
| | B) | 4 |
| | C) | 3 |
| | D) | 2 |
|
17 | |
A ________ switch combines space-division and time-division technologies to take advantage of the best of both. |
|
| | A) | TST |
| | B) | SSS |
| | C) | TTT |
| | D) | none of the above |
|
18 | |
The most popular technology in time-division switching is called the _________. |
|
| | A) | STI |
| | B) | ITS |
| | C) | TSI |
| | D) | none of the above |
|
19 | |
Based on the Clos criteria, if N = 200, then n must be equal to or greater than ____. |
|
| | A) | 10 |
| | B) | 20 |
| | C) | 30 |
| | D) | 40 |
|
20 | |
Based on the Clos criteria, if N = 200, then k must be equal to or greater than ____. |
|
| | A) | 21 |
| | B) | 19 |
| | C) | 31 |
| | D) | 41 |
|
21 | |
Based on the Clos criteria, if N = 200, then the minimum number of crosspoints is greater than or equal to _______. |
|
| | A) | 15,200 |
| | B) | 18,000 |
| | C) | 42,000 |
| | D) | 20,000 |
|
22 | |
In a one-stage space division switch, if N = 200, the number of crosspoints is ______. |
|
| | A) | 10,000 |
| | B) | 20,000 |
| | C) | 40,000 |
| | D) | 30,000 |
|
23 | |
In a three-stage space division switch, if N = 200, the number of crosspoints is ______. |
|
| | A) | 40,000 |
| | B) | greater than 40,000 |
| | C) | less than 40,000 |
| | D) | greater than 100,000 |
|
24 | |
A ________ switch combines crossbar switches in several (normally three) stages. |
|
| | A) | multistage |
| | B) | multiple crossbar |
| | C) | multiple path |
| | D) | none of the above |
|
25 | |
In _______ switching, the paths in the circuit are separated from one another spatially. |
|
| | A) | time-division |
| | B) | space-division |
| | C) | two-dimensional |
| | D) | three-dimensional |
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26 | |
A switched WAN is normally implemented as a _______ network. |
|
| | A) | virtual-circuit |
| | B) | datagram |
| | C) | circuit-switched |
| | D) | none of the above |
|
27 | |
In a ________ network, two types of addressing are involved: global and local. |
|
| | A) | virtual-circuit |
| | B) | datagram |
| | C) | circuit-switched |
| | D) | none of the above |
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28 | |
The network layer in the Internet is designed as a __________ network. |
|
| | A) | virtual-circuit |
| | B) | datagram |
| | C) | circuit-switched |
| | D) | none of the above |
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29 | |
A switch in a datagram network uses a routing table that is based on the ______ address. |
|
| | A) | source |
| | B) | destination |
| | C) | local |
| | D) | none of the above |
|
30 | |
The _______ address in the header of a packet in a datagram network normally remains the same during the entire journey of the packet. |
|
| | A) | source |
| | B) | destination |
| | C) | local |
| | D) | none of the above |