Huawei CloudCampus Solution has multiple application scenarios, and iMaster NCE-Campus provides different APIs for each application scenario. Match the following application scenarios with the open APIs provided by iMaster NCE-Campus.

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In the following figure, a GRE tunnel is established between R1 and R2. If the command ping -a 10.1.1.1
10.3.1.1 is run on R1, which of the following statements is correct about the ICMP packet sent by GE0/0/1 of R1?

• A.The packet will be encapsulated using GRE, and the source and destination IP addresses in the outer IP header are10.0.12.1and10.0.12.2, respectively.
• B.The packet will be encapsulated using GRE, and the source and destination IP addresses in the outer IP header are10.0.12.1and10.3.1.1, respectively.
• C.The packet will be encapsulated using GRE, and the source and destination IP addresses in the inner IP header are10.1.1.1and10.3.1.1, respectively.
• D.The packet will be encapsulated using GRE, and the source and destination IP addresses in the inner IP header are10.1.1.1and10.0.12.2, respectively.

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The following statement about the VPNv4 address is wrongly described as ?

• A.Carries the RD attribute when BGP publishes both reachable and unreachable VPNv4 routes.
• B.The VPNv4 address has a total of 12 bytes, including an 8-byte route identifier RD (Route Distingulisher) and a 4-byte IPv4 Address prefix.
• C.Local PE sets up An Export Target for these routes before releasing VPNv4 routes learned from sites that are directly connected to them to other PEEs attributes, and are published with routes as extended community attributes for BGP.
• D.By default, PE does not perform VPN-target filtering on received VPNv4 routes.

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IS-IS supports the processing and computation of IPv6 routes by adding ATLPs to carry IPv6 addresses and reachability information.

• A.TRUE
• B.FALSE

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VrRP priority is not configured as O, devices that issue VRRP priority of 0 stop participating in the VRRP backup group, notifying the backup device to become a laster device as soon as possible without having to wait until the Master_Down_Interval timer times out

• A.True
• B.False

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