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1 | |
A one-to-all communication between one source and all hosts on a network is classified as a _______ communication. |
| | A) | unicast |
| | B) | multicast |
| | C) | broadcast |
| | D) | None of the choices are correct |
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2 | |
A one-to-many communication between one source and a specific group of hosts is classified as a _______ communication. |
| | A) | unicast |
| | B) | multicast |
| | C) | broadcast |
| | D) | None of the choices are correct |
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3 | |
A one-to-one communication between one source and one destination is classified as a _______ communication. |
| | A) | unicast |
| | B) | multicast |
| | C) | broadcast |
| | D) | None of the choices are correct |
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4 | |
In ______, the router forwards the received packet through only one of its interfaces. |
| | A) | unicasting |
| | B) | multicasting |
| | C) | broadcasting |
| | D) | None of the choices are correct |
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5 | |
In _______, the router may forward the received packet through several of its interfaces. |
| | A) | unicasting |
| | B) | multicasting |
| | C) | broadcasting |
| | D) | None of the choices are correct |
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6 | |
Emulation of ________ through ___________ is not efficient and may create long delays. |
| | A) | unicasting; multiple unicasting |
| | B) | multicasting; multiple unicasting |
| | C) | broadcasting; multicasting |
| | D) | None of the choices are correct |
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7 | |
In unicast routing, each router in the domain has a table that defines a ______ path tree to possible destinations. |
| | A) | average |
| | B) | longest |
| | C) | shortest |
| | D) | None of the choices are correct |
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8 | |
In multicast routing, each involved router needs to construct a ________ path tree for each group. |
| | A) | average |
| | B) | longest |
| | C) | shortest |
| | D) | None of the choices are correct |
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9 | |
In the _______ tree approach, each router needs to have one shortest path tree for each group. |
| | A) | group-shared |
| | B) | source-based |
| | C) | destination-based |
| | D) | None of the choices are correct |
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10 | |
In the group-shared tree approach, ________ is/are involved in multicasting. |
| | A) | only the core router |
| | B) | all routers |
| | C) | only some routers |
| | D) | None of the choices are correct |
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11 | |
Multicast link state routing uses the _______ tree approach. |
| | A) | source-based |
| | B) | group-shared |
| | C) | destination-based |
| | D) | None of the choices are correct |
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12 | |
The Multicast Open Shortest Path First (MOSPF) protocol is an extension of the OSPF protocol that uses multicast routing to create source-based trees. The protocol is based on _______ routing. |
| | A) | distance vector |
| | B) | link state |
| | C) | path vector |
| | D) | None of the choices are correct |
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13 | |
MOSPF is a _______ protocol. |
| | A) | data-driven |
| | B) | command-driven |
| | C) | both data- and command-driven |
| | D) | None of the choices are correct |
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14 | |
_________ broadcasts packets, but creates loops in the systems. |
| | A) | Forwarding |
| | B) | Flooding |
| | C) | Backwarding |
| | D) | None of the choices are correct |
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15 | |
In RPF, a router forwards only the copy that has traveled the _______ path from the source to the router. |
| | A) | shortest |
| | B) | longest |
| | C) | average |
| | D) | None of the choices are correct |
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16 | |
RPF eliminates the ________ in the flooding process. |
| | A) | forwarding |
| | B) | backwarding |
| | C) | flooding |
| | D) | None of the choices are correct |
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17 | |
RPB creates a shortest path _______ tree from the source to each destination. |
| | A) | unicast |
| | B) | multicast |
| | C) | broadcast |
| | D) | None of the choices are correct |
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18 | |
RPB guarantees that each destination receives _________ of the packet. |
| | A) | one copy |
| | B) | no copies |
| | C) | multiple copies |
| | D) | None of the choices are correct |
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19 | |
In ________, the multicast packet must reach only those networks that have active members for that particular group. |
| | A) | RPF |
| | B) | RPB |
| | C) | RPM |
| | D) | None of the choices are correct |
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20 | |
_______ adds pruning and grafting to _______ to create a multicast shortest path tree that supports dynamic membership changes. |
| | A) | RPM; RPB |
| | B) | RPB; RPM |
| | C) | RPF: RPM |
| | D) | None of the choices are correct |
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21 | |
__________ is an implementation of multicast distance vector routing. It is a source-based routing protocol, based on RIP. |
| | A) | MOSPF |
| | B) | DVMRP |
| | C) | CBT |
| | D) | None of the choices are correct |
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22 | |
DVMRP is a ________routing protocol, based on RIP. |
| | A) | source-based |
| | B) | group-shared |
| | C) | destination-based |
| | D) | None of the choices are correct |
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23 | |
Pruning and grafting are strategies used in _______. |
| | A) | RPF |
| | B) | RPB |
| | C) | RPM |
| | D) | None of the choices are correct |
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24 | |
A _______ message tells an upstream router to stop sending multicast messages for a specific group through a specific router. |
| | A) | weed |
| | B) | graft |
| | C) | prune |
| | D) | None of the choices are correct |
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25 | |
A _______ message tells an upstream router to start sending multicast messages for a specific group through a specific router. |
| | A) | weed |
| | B) | graft |
| | C) | prune |
| | D) | None of the choices are correct |
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26 | |
CBT is a ________ protocol that uses a core as the root of the tree. |
| | A) | source-based |
| | B) | group-shared |
| | C) | destination-based |
| | D) | None of the choices are correct |
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27 | |
PIM-DM is used in a _______ multicast environment. |
| | A) | dense |
| | B) | sparse |
| | C) | dense or sparse |
| | D) | None of the choices are correct |
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28 | |
PIM-SM is used in a _______multicast environment such as a WAN. |
| | A) | dense |
| | B) | sparse |
| | C) | dense or sparse |
| | D) | None of the choices are correct |
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29 | |
In _______, a logical tunnel is established by encapsulating the multicast packet inside a unicast packet. |
| | A) | UNIBONE |
| | B) | MULTBONE |
| | C) | MBONE |
| | D) | None of the choices are correct |
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