As shown in the figure, all interfaces of the router enable OSPF. The ip address identified in the figure is the IP address of the device's Loopback 0 port. R1, R2, R3EJLoopbacD are advertised in area 1, and Loopbacfk D of R4 is advertised in area D, the Loopback D of R5 is advertised in area 2. Which of the following addresses can ping each other?

• A.10.0.3.3 and 10.0.5.5
• B.10.0.2.2 and 10.0.3.3
• C.10.0.4.4 and 10.0.2.2
• D.10.0.2.2 and 10.0.5.5

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What is the default aging time of the MA, C address table of Huawei switches?

• A.400
• B.5
• C.500
• D.300

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Regarding BGP/MPLS IPVPN routing interaction, which of the following description is wrong?

• A.After the egress PE receives the VPNv4 route advertised by the ingress PE, it filters the VPNv4 route according to the RT attribute carried by the route
• B.The egress PE can send IPv4 routes to the remote CE through BGP, IGP or static routing
• C.The ingress PE will convert the IPv4 route received from the CE into a VPNv4 route, and save it according to different VPN instances
• D.The exchange between PE and CE is IPv4 routing information

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If the sticky MA, C function is enabled on an interface, by default, the number of MA, C addresses learned by the interface is as large as few?

• A.15
• B.1
• C.10
• D.5

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OSPF is deployed in a small and medium-sized network. When checking the routing table of a certain device, it is found that there are only direct routes. Which operation is unlikely to cause the fault?

• A.The configured user authority is too low
• B.Routing protocol configuration error
• C.The routing policy is incorrectly configured
• D.Port address configuration problem

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