Regarding the description of IGMP Snooping, which is correct? (Multiple Choice)

• A.IGMP Snooping builds a MAC multicast address table by monitoring IGMP messages sent by the host
• B.IGMP Snooping does not consume the CPU of the switch
• C.IGMP Snooping runs at the link layer and is a multicast restriction mechanism on the Layer 2 Ethernet switch, which is used to manage and control multicast groups
• D.IGMP Snooping solves the problem of multicast packets broadcast at Layer 3

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Regarding the configuration of the security level of the firewall security zone, which of the following statement is wrong?

• A.The newly created security zone, the system defaults its security level to 1
• B.Once the security level is set, it is not allowed to change
• C.The security level can only be set for the custom security zone
• D.In the same system, two security zones are not allowed to configure the same security level

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In route-policy, what are the BGP attributes that can be used in the apply clause? (Multiple Choice)

• A.Tag
• B.Local-Preference
• C.AS-Path
• D.MED

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Which of the following is the correct description of the process of registering the source DR with the RP in the PIM-SM?

• A.The registration message encapsulates the multicast service data.
• B.The registration message is used to construct an RPT tree between the source DR and the RP.
• C.The registration message is a multicast message.
• D.The RP sends a registration stop message as soon as it receives the registration message.

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If the OSPF protocol is running on the network, configure the non-backbone area in the OSPP area as the LSA with the ls-id of 0.0.0.0 in the Totally Stub Totally Stub area. Which LSA does the LSA belong to?

• A.LSA5
• B.LSA1
• C.LSA2
• D.LSA3

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