Nework Layer Routing Questions

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51.

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 above

Correct Answer: A

None.

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52.

RPF eliminates the ________ in the flooding process

A

forwarding

B

backwarding

C

flooding

D

none of the above

Correct Answer: D

None.

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53.

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

A

one copy

B

two copies

C

a or b

D

none of the above

Correct Answer: D

None.

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54.

RPB creates a shortest path _______ tree from the source to each destination

A

unicast

B

multicast

C

broadcast

D

none of the above

Correct Answer: C

None.

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55.

RPB guarantees that each destination receives _________ of the packet

A

one copy

B

no copies

C

multiple copies

D

none of the above

Correct Answer: A

None.

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56.

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 above

Correct Answer: C

None.

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57.

_________ 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 above

Correct Answer: B

None.

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58.

. DVMRP is a ________routing protocol, based on RIP

A

source-based

B

group-shared

C

both a and b

D

none of the above

Correct Answer: A

None.

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59.

Pruning and grafting are strategies used in _______

A

RPF

B

RPB

C

RPM

D

none of the above

Correct Answer: C

None.

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60.

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 above

Correct Answer: C

None.

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