Regarding the default metric value of different routing protocols when importing routes, the following description is correct: __________

• A.When OSPF routing protocol redistributes routes, the default cost of the redistributed routes is 0
• B.BGP uses the cost value of the imported route as the MED value after importing the BGP domain
• C.When OSPF routing protocol redistributes routes, the default cost of the redistributed routes is 1
• D.BGP uses the cost value of the imported route plus 1 as the MED value after importing the BGP domain

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In the topology shown in the figure, the following configurations are performed on RTA, RTB, RTC and RTD respectively:
RTA-LoopBack0] ip address 1.1.1.1 255.255.255.255
RTA]ospf 1
RTA-ospf-1]area 1
RTA-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTA-ospf-1]import-route direct
RTB-LoopBack0] ip address 2.2.2.2 255.255.255.255
RTB]ospf 1
RTB-ospf-1]area 1
RTB-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTB-ospf-1-area-0.0.0.1]area 0
RTB-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
RTB-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255
RTC-LoopBack0] ip address 3.3.3.3 255.255.255.255
RTC]ospf 1
RTC-ospf-1]area 0
RTC-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255
RTC-ospf-1-area-0.0.0.0]area 2
RTC-ospf-1-area-0.0.0.2]nssa default-route-advertise
RTC-ospf-1-area-0.0.0.2]network 30.0.0.0 0.0.0.255
RTC-ospf-1]import-route direct
RTD-LoopBack0] ip address 4.4.4.4 255.255.255.255
RTD]ospf 1
RTD-ospf-1]area 2
RTD-ospf-1-area-0.0.0.2]network 30.0.0.0 0.0.0.255
RTD-ospf-1-area-0.0.0.2]network 4.4.4.4 0.0.0.0
RTD-ospf-1-area-0.0.0.2]nssa
Then area 2 may not inject _____

• A.Tpe5 LSA
• B.Tpe7 LSA
• C.Tpe3 LSA
• D.Tpe4 LSA

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r Regarding the stub area in the OSPF protocol, the following statement is correct: _______

• A.The virtual link cannot traverse the stub area
• B.The backbone area cannot be configured as a stub area
• C.Tpe7 LSA is not allowed to be injected in the stub area
• D.ASBR cannot exist in the stub area

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The following is the output of the displaipv6 routing-table command executed on a router:

Then the following statement is correct _________.

• A.The E0/0 interface of the router is not configured with an IPv6 address, and the Vlan1 interface is configured with 2009:2010:1::1/128
• B.The router has an IPv6 static route that is effective, and the outgoing interface is E0/0
• C.The direct route of FE80::/10 can forward packets whose destination address is in the prefix range of FE80::/10
• D.There are 5 active routes in the router's IPv6 routing table, among which there are no equal-cost routes

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Which of the following commands can be used to view all the configured and enabled PBR information?

• A.displaip polic-based-route
• B.displaip routing-table
• C.displaip polic-based-route statistics
• D.displapolic-based-route

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