RIP v1
发送路由更新时不携带子网掩码，属于有类路由协议
发送路由更新时，目标地址为广播地址：255.255.255.255  附有图片（用PT可以直接打开）
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R-A
en
conf t
no ip domain lookup
in f0/0
ip address 192.168.1.1 255.255.255.0
no shutdown
exit
in f1/1
ip address 10.0.0.2 255.255.255.0
no shutdown
exit
router rip
network 10.0.0.0
network 192.168.1.0
exit
exit
debug ip rip
wr
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R-B
en
conf t
no ip domain lookup
in f0/0
ip address 10.0.0.1 255.255.255.0
no shutdown
exit
in f1/1
ip address 20.0.0.2 255.255.255.0
no shutdown
exit
router rip
network 10.0.0.0
network 20.0.0.0
exit
exit
debug ip rip
wr
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R-C
en
conf t
no ip domain lookup
in f0/0
ip address 20.0.0.1 255.255.255.0
no shutdown
exit
in f-/1
ip address 192.168.2.2 255.255.255.0
no shutdown
exit
router rip
network 20.0.0.0
network 192.168.2.0
exit
exit
debug ip rip
wr
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PC-A
 IP:192.168.1.100
 子网掩码：255.255.255.0
 网关：192.168.1.1
PC-B
IP:192.168.1.100
子网掩码：255.255.255.0
网关：192.168.1.1
PC-C
IP:192.168.2.100
子网掩码：255.255.255.0
网关：192.168.2.1
PC-D
IP:192.168.2.200
子网掩码：255.255.255.0
网关：192.168.2.1
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想了解发送路由更新时要携带子网掩码，属于无类路由协议
发送路由更新时，目标地址为广播地址：224.0.0.9
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