48、路由器a的配置為：
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.配置為
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
如下說法正確的是（ c ）
a、兩端廣域網可以聯通，但區域網不可以連通
b、兩端廣域網不可以連通，但區域網可以連通
c、廣域網和區域網都可以連通
d、廣域網和區域網都不能連通
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
