An IGMP version 3 receiver signals EXCLUDE mode with an empty EXCLUDE list. What does this indicate?
A. It is willing to receive traffic from any source
B. This is the initial join message and a selection of source will follow
C. This is the way it indicates it is leaving the group
D. This is the initial join message and exclusions of sources will follow
正解:A
質問 2:
Click the exhibit.
The network administrator of 2001 ;DB8:FEED::/64 wants to embed an RP for the network. The RP's address is 2001:DB8:FEED::7. Which of the following multicast address ranges would suit this purpose? (The exhibit shows the group-to-RP mapping for your reference only.)
A. FF7x: 740:2001:DB8:FEED::/96 (x is scope)
B. FF7x:740:2001:DB8:FEED::/80(x is scope)
C. FF7x:730:2001:DBS:FEED::/96 (x is scope)
D. FF7x:730:2001:DBS:FEED::/80 (x is scope)
正解:A
質問 3:
Which protocol is used to establish the S-PMSI in Draft Rosen?
A. PIM ASM
B. PIM SSM
C. Either PIM SSM or PIM ASM
D. PIM DM
正解:B
質問 4:
When a BSR message with a higher priority is seen, will a new BSR election occur?
A. Yes, after a bootstrap message wait interval
B. Yes, immediately
C. No, the new election only occurs when the elected BSR fails
D. Depends on the local configuration of whether to allow the new election or not
正解:B
質問 5:
What message does the diverging router (router where the shared and Source Path Trees diverge) generate to stop the multicast traffic arriving via the RP?
A. PIM (*, G) RP-bit prune
B. PIM (*, G) Join
C. PIM Hello
D. PIM (*, G) RP-bit prune
E. IGMP (*, G) Join
正解:D
質問 6:
Which of the following is NOT a characteristic of multicast?
A. Multicast relies on an existing IP routing infrastructure.
B. Multicast traffic may follow a different path than unicast traffic between the same two points.
C. A distinct multicast topology can be created instead of using the unicast topology.
D. When PIM is used, the unicast routing topology has no impact on the multicast topology.
正解:D
質問 7:
Which of the following configuration steps are mandatory for IPv4 PIM ASM to work? (Choose two)
A. Configure PIM on core and source facing interfaces
B. Define the rpf-table
C. Configure PIM on access facing interfaces
D. Configure RP statically or via BSR
E. Create and apply register and join policies
正解:A,D
質問 8:
Refer to the configuration exhibit.
Channel 239.1.1.1, 239.1.1.2, 239.1.1.3 and 239.1.1.5 have already been established.
What will happen when this router receives two IGMP reports to join group 239.1.1.4 and 239.1.1.8?
A. Channel 239.1.1.8 will be established while 239.1 1.4 will not
B. Neither of these two channels will be established
C. Both of these two channels will be established
D. Channel 239.1.1.4 will be established while 239.1.1.8 will not
正解:A
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