48、路由器a的配置为：
quidway#show run
now create configuration...
current configuration!
frame-relay switching!
interface ethernet0
ip address
ip rip version 2 mcast!
interface serial0
clock-select dteclk1
encapsulation frame-relay
frame-relay intf-type dce
frame-relay interface-dlci 100
ip address
ip rip version 2 mcast!
interface serial1
encapsulation ppp!
interface serial2
flowcontrol normal
async mode dedicated
encapsulation ppp!
exit
router rip
no auto-summary
neighbor !
end
路由器b的.配置为
quidway#show run
now create configuration...
current configuration!
!interface ethernet0
ip address
ip rip version 2 mcast
!
interface serial0
encapsulation frame-relay
ip address
ip rip version 2 mcast
!
interface serial1
encapsulation ppp
!
interface serial2
flowcontrol normal
async mode dedicated
encapsulation ppp
!
exit
router rip
no auto-summary
neighbor
!
end
如下说法正确的是（ c ）
a、两端广域网可以联通，但局域网不可以连通
b、两端广域网不可以连通，但局域网可以连通
c、广域网和局域网都可以连通
d、广域网和局域网都不能连通
49、路由器a的配置如下：
quidway#show run
now create configuration...
current configuration
!
!
interface ethernet0
ip address
ip ospf enable area
!
interface serial0
clock-select dteclk1
encapsulation ppp
ip address
ip ospf enable area
!
interface serial1
encapsulation ppp
!
interface serial2
flowcontrol normal
async mode dedicated
encapsulation ppp
!
exit
router ospf enable
!
end
路由器b配置如下
quidway#show run
now create configuration...
current configuration
!
!
interface ethernet0
ip address
ip ospf enable area
!
interface serial0
encapsulation ppp
ip address
ip ospf enable area
!
interface serial1
encapsulation ppp
!
interface serial2
flowcontrol normal
async mode dedicated
encapsulation ppp
!
exit
router ospf enable
!
end
