As shown in the figure, in the hub&spoke multicast mode of MPLS bgp VPN, in order to realize that the branch can only communicate with the headquarters, the branches cannot communicate with each other. Which of the following schemes can the RT be set?

• A.Headquarters: Import Target: 12:3 Export Target: 12:3 Branch 1: Import Target: 12:3 Export Target: 12:3 Branch 2: Import Target: 12:3 Export Target: 12:3
• B.Headquarters: Import Target: 1:1 Export Target: 3:3 Branch 1: Import Target: 3:3 Export Target: 1:1 Branch 2: Import Target: 3:3 Export Target: 2:2
• C.Headquarters: Import Target: 12:3 Export Target: 3:12 Branch 1: Import Target: 3:12 Export Target: 12:3 Branch 2: Import Target: 3:12 Export Target: 12:3
• D.Headquarters: Import Target: 2:2 Export Target: 3:3 Branch 1: Import Target: 3:3 Export Target: 1:1 Branch 2: Import Target: 3:3 Export Target: 2:2

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In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic?

• A.Join/Prune mechanism
• B.Assert mechanism
• C.BSR/RP mechanism
• D.Register mechanism

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In the MPLS VPN, what is the role of RT? (Multiple choice)

• A.Allow the peer PE to decide which VPNv4 routes to import into the specific VRF.
• B.Allow the peer PE to decide which VPNv4 routes are not to be imported into a specific VRF.
• C.Allow the peer CE to decide which VPNv4 routes to import into the specific VRF.
• D.Allow the peer CE to decide which VPNv4 routes are not to be imported into a specific VRF.

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The following is about the RD attribute filter of BGP, what is the correct description? (Multiple Choice)

• A.If RD-filter is configured, but the RD of the route does not match any of the RDs defined in the rule, the default match result is Permit.
• B.The relationship between the rules configured by RD-filter is "or"
• C.If RD-filter is not configured, but this RD-filter is used for filtering, the matching result is deny.
• D.Matching multiple rules in the order of configuration

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Assuming that the port shaping rate is 100 Mbps, the input bandwidth and configured PIR of each service of the interface are as follows. Then, after the first round of scheduling, what is the bandwidth allocated by the EF queue?

• A.15M
• B.90M
• C.25M
• D.30M

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