|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |