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Q49. Which of the following are mandatory functions of a multicast receiver on a multicast network using IGMP version 2? (Choose two) 

A. Report their multicast group membership to their local router 

B. Signal their local router as they join and leave multicast groups 

C. Generate feedback to the network or source 

D. Listen for announcements advertising available sessions from the source 

E. Generate multicast data to the group 

Answer: AB 


Q50. How many responses should be received if IGMP version 3 is in use and a router sends a Query to a specific multicast group that has 6 active receivers on the local broadcast domain? 

A. 1 

B. 2 

C. 6 

D. 7 

E. It will be random 

Answer: C 


Q51. How many multicast groups may a single receiver join at any one time? 

A. 1 

B. 2 

C. 4 

D. 256 

E. As many as the operating system and software allow 

Answer: E 


Q52. Which of the following is a characteristic of a packet with a destination address in the Local Network Control Block address range? 

A. A packet with this address is always forwarded throughout the multicast routing domain but never forwarded outside the multicast routing domain 

B. A packet with this address can only be processed by a router 

C. A packet with this address is never forwarded beyond the local link unless the TTL is greater than 1 

D. A packet with this address is never forwarded beyond the local link regardless of the TTL 

Answer: D 


Q53. Four routers in a domain are configured as BSR candidate. Router A is configured with a BSR priority of 10, Router B is configured with a BSR priority of 100. Router C and Router D are at the default value. Router D has the highest IP address. Which router will be elected the PIM BSR? 

A. Router A 

B. Router B 

C. Router C 

D. Router D 

Answer: B 


Q54. How do the routers in the PIM domain become aware of the address of the elected BSR? 

A. It is unicast to them 

B. It is flooded through the network in a bootstrap message 

C. It is preconfigured on all routers 

D. It is flooded through the network in the PIM Hello 

Answer: B 


Q55. Refer to the configuration exhibit. 

Channel 239.1.1.11239.1.1.2, 239.1.1.3 and 239.1.1.5 have already been established. 

What will happen when this router receives a IGMP report to join group 239.1.1.6? 

A. The router will tear down channel 239.1.1.3 as it's non-mandatory and establish a new channel for 239.1.1.6 

B. The router will tear down either channel 239.1.1.1 or 239.1.1.2 as they are low class and establish a new channel for 239.1.1.6 

C. No existing channel will be torn down and the new channel for 239.1.1.6 will be established as there is enough resource 

D. The new channel 239.1.1.6 won't be established and a log will be generated 

Answer: D 


Q56. Refer to the following exhibit. 

PIM is using the unicast table for RPF-check and the interface IGP metrics are shown. What will happen when Router B receives the multicast packet on its interface facing Router A? 

A. Discard the multicast packet as RPF-check fails 

B. Forward the multicast packet to Router D (RP) according to its routing table 

C. Forward the multicast packet out of all the interfaces in its (*,239.1.1.1) entry's outgoing interface list 

D. Forward the multicast packet out of all the interfaces in its (192.168.1.1,239.1.1.1) entry's outgoing interface list 

Answer: A