如下图所示的网络,路由器配置信息如下,据此网络和配置,下列说法正确的是? Router B:
interface Serial1/0/0
link-protocol ppp
ip address 10.0.21.1 255.255.255.0
#
ospf 1 router-id 10.0.21.1
area 0.0.0.0
network 10.0.21.1 0.0.0.0
#
Router A
interface Serial1/0/0
link-protocol ppp
ip address 10.0.12.1 255.255.255.0
#
ospf 1 router-id 10.0.12.1
area 0.0.0.0
network 10.0.12.1 0.0.0.0 #
(含图)