填空题
[说明]
下面是某路由器的部分配置信息，解释部分语句的含义。
[配置路由器信息]
Current configuration:
!
hostname router1
isdn switch-type basic-net3
1
!
interface Ethernet0
ip address 10.0.0.1 255.255.255.0
ip nat inside
2
!
interface bri0
ip address negotiated
3
ip nat outside
encapsulation ppp
ppp authentication pap callin
4
ppp multlink
5
dialer-group 1
dialer string 2633
ppp pap sent-username 263 password 263
6
ip route 0.0.0.0 0.0.0.0 bri 0
access-list 2 permit any
7
dialer-list 1 protocol ip permit
8
ip nat inside source list 2 interface bri 0 overload
9
…
End