In the topology shown in the figure, the following configurations are performed on RTA, RTB, RTC and RTD:
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 20.0.0.0 0.0.0.255
RTB-ospf-1]import-route direct
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 3.3.3.3 0.0.0.0
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]stub
RTC-ospf-1-area-0.0.0.2]network 30.0.0.0 0.0.0.255
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 4.4.4.4 0.0.0.0
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]stub
Which of the following routes may exist in the RTD routing table ______.

• A.1.1.1.1/32
• B.2.2.2.2/32
• C.10.0.0.0/24
• D.3.3.3.3/32

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In the IS-IS network shown in the figure, RTB is configured with route aggregation.
So which of the following routes are included in the IS-IS routing table of RTC?

• A.172.16.3.0/24
• B.172.16.1.0/24
• C.172.16.2.0/24
• D.172.16.0.0/22

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Which of the following statements are true about the BGP aggregation function?

• A.BGP manual aggregation can advertise aggregated routes and specific routes at the same time, or only select specific routes to generate aggregated routes.
• B.Since BGP supports CIDR, BGP auto-aggregation can automatically aggregate the routes existing in the routing table into routes with natural masks.
• C.There are two types of BGP aggregation: automatic aggregation and manual aggregation.
• D.When applying BGP manual aggregation, you can use the attribute-polic- parameter to change the attributes of the aggregated routes for more flexible control.

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Regarding the filter-polic filter, which of the following statements is incorrect?

• A.You can use filter-polic in RIP to filter RIP routing information received from neighbors
• B.You can use filter-polic in RIP to filter the entire IP routing table sent to neighbors
• C.You can use filter-polic in OSPF to filter the routing information between areas
• D.You can use filter-polic in IS-IS to filter IS-IS routing information received from neighbors

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In H3C devices, the default priority value of RIP protocol routing is ________.

• A.255
• B.150
• C.100
• D.10

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