8.在如图所示的拓扑中,RTA、RTB、RTC和RTD上分别执行如下配置:(含图)
RTA-LoopBackO] 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-LoopBackO] ip address 2.2.22 255.255.255.255
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-LoopBackO] 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
RTC-ospf-1 -area-0.0.0.2]network 30.0.0.0 0.0.0.255
RTC-ospf-1 -area-0.0.0.2]network 3.3.3.3 0.0.0.0
RTD-LoopBackO] 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]nssa
RTD-ospf-1 ]import-route direct
RTD的路由表中可能存在以下哪些路由 。