Florida Gulf Coast University

GEB 3250

Chapter 15 Quiz

1)A one-to-all communication between one source and all hosts on a network is classified as a  

communication.

1. unicast
2. multicast
3. broadcast
4. none of the above

2. ) one-to-many communication between one source and a specific group of hosts is classified as a

                    communication.

1. unicast
2. multicast
3. broadcast
4. none of the above

3. )A one-to-one communication between one source and one destination is classified as a

ommunication.

1. unicast
2. multicast
3. broadcast
4. none of the above

4. )In                  , the router forwards the received packet through only one of its interfaces.

1. unicasting
2. multicasting
3. broadcasting
4. none of the above

5. )In                     , the router may forward the received packet through several of its interfaces.

1. unicasting
2. multicasting
3. broadcasting
4. none of the above

6. )Emulation of                            through                                  is not efficient and may create long delays.

1. unicasting; multiple unicasting
2. multicasting; multiple unicasting
3. broadcasting; multicasting
4. none of the above

7. )In unicast routing, each router in the domain has a table that defines a                                     path tree to possible

destinations.

1. average
2. longest
3. shortest
4. none of the above

8. )In multicast routing, each involved router needs to construct a                                        path tree for each group.

1. average
2. longest
3. shortest
4. none of the above

9. )In the                       tree approach, each router needs to have one shortest path tree for each group.

1. group-shared
2. source-based
3. a or b
4. none of the above

10. )In the group-shared tree approach,                                   involved in multicasting.

1. only the core router is
2. all routers are
3. only some routers are
4. none of the above

11. )Multicast link state routing uses the                              tree approach.

1. source-based
2. group-shared
3. a or b
4. none of the above

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.

1. distance vector
2. link state
3. path vector
4. none of the above

13. )MOSPF is a                           protocol.

1. data-driven
2. command-driven
3. both a and b
4. none of the above

14. )                         broadcasts packets, but creates loops in the systems.

1. Forwarding
2. Flooding
3. Backwarding
4. none of the above

15. )In RPF, a router forwards only the copy that has traveled the                                      path from the source to the

router.

1. shortest
2. longest
3. average
4. none of the above

16. )RPF eliminates the                              in the flooding process.

1. forwarding
2. backwarding
3. flooding
4. none of the above

17. )RPF guarantees that each network receives only                         of the multicast packet.

1. one copy
2. two copies
3. a or b
4. none of the above

18. )RPB creates a shortest path                             tree from the source to each destination.

1. unicast

2. multicast
3. broadcast
4. none of the above

19. )RPB guarantees that each destination receives                                     of the packet.

1. one copy
2. no copies
3. multiple copies
4. none of the above

20. )In                        , the multicast packet must reach only those networks that have active members for that

particular group.

1. RPF
2. RPB
3. RPM
4. none of the above

21. )                    adds pruning and grafting to                              to create a multicast shortest path tree that supports

dynamic membership changes.

1. RPM; RPB
2. RPB; RPM
3. RPF: RPM
4. none of the above

22. )                            is an implementation of multicast distance vector routing. It is a source- based routing

protocol, based on RIP.

1. MOSPF
2. DVMRP
3. CBT
4. none of the above

23. )DVMRP is a                            routing protocol, based on RIP.

1. source-based
2. group-shared
3. both a and b
4. none of the above

24. )Pruning and grafting are strategies used in                                .

1. RPF
2. RPB
3. RPM
4. none of the above

25. )A                      message tells an upstream router to stop sending multicast messages for a specific group

through a specific router.

1. weed
2. graft
3. prune
4. none of the above