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+````
+Router>enable
+Router#conf t
+Enter configuration commands, one per line.  End with CNTL/Z.
+Router(config)#interface f0/0
+Router(config-if)#ip address 192.168.3.1 255.255.255.0
+Router(config-if)#no shut
+
+Router(config-if)#
+%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
+
+%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
+
+Router(config-if)#exit
+Router(config)#interface serial0/0/0
+Router(config-if)#ip address 10.0.0.2 255.255.255.0
+Router(config-if)#no shut
+
+%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
+Router(config-if)#
+Router(config-if)#ip route 192.168.1.0 255.255.255.0 10.0.0.1
+Router(config)#ip route 192.168.1.0 255.255.255.0 10.0.0.1
+Router(config)#ip route 192.168.2.0 255.255.255.0 10.0.0.1
+Router(config)#end
+Router#
+%SYS-5-CONFIG_I: Configured from console by console
+
+Router#
+````
+
+```
+Router>enable
+Router#interface f0/0
+                 ^
+% Invalid input detected at '^' marker.
+	
+Router#conf t
+Enter configuration commands, one per line.  End with CNTL/Z.
+Router(config)#interface f0/0
+Router(config-if)#ip add 192.168.1.1 255.255.255.0 
+Router(config-if)#no shut
+
+Router(config-if)#
+%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
+
+%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
+
+Router(config-if)#interface f0/1
+Router(config-if)#ip add 192.168.2.1 255.255.255.0
+Router(config-if)#no shut
+
+Router(config-if)#
+%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
+
+%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
+
+Router(config-if)#interface serial0/0/0
+Router(config-if)#ip address 10.0.0.1 255.255.255.0
+Router(config-if)#no shut
+
+Router(config-if)#
+%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up
+
+Router(config-if)#exit
+Router(config)#ip route 
+%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed sta
+Router(config)#ip route 192.168.3.0 255.255.255.0 10.0.0.2
+Router(config)#service dhcp
+Router(config)#ip dhcp cc
+                       ^
+% Invalid input detected at '^' marker.
+	
+Router(config)#ip dhcp pool cc
+Router(dhcp-config)#network 192.168.1.0 255.255.255.0
+Router(dhcp-config)#default-router 192.168.1.1
+Router(dhcp-config)#exit
+Router(config)#service dhcp
+Router(config)#ip dhcp pool dd
+Router(dhcp-config)#network 192.168.2.0 255.255.255.0
+Router(dhcp-config)#default-router 192.168.2.1
+Router(dhcp-config)#exit
+Router(config)#inter fa0/0
+Router(config-if)#ip helper-address 192.168.3.2
+Router(config-if)#exit
+Router(config)#inter fa0/1
+Router(config-if)#ip helper-address 192.168.3.2
+Router(config-if)#exit
+Router(config)#exit
+Router#
+%SYS-5-CONFIG_I: Configured from console by console
+
+Router#
+```
+
+```
+
+Packet Tracer PC Command Line 1.0
+C:\>ping 192.168.2.2
+
+Pinging 192.168.2.2 with 32 bytes of data:
+
+Request timed out.
+Reply from 192.168.2.2: bytes=32 time<1ms TTL=127
+Reply from 192.168.2.2: bytes=32 time=1ms TTL=127
+Reply from 192.168.2.2: bytes=32 time=1ms TTL=127
+
+Ping statistics for 192.168.2.2:
+    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
+Approximate round trip times in milli-seconds:
+    Minimum = 0ms, Maximum = 1ms, Average = 0ms
+
+C:\>
+C:\>
+```
+
+![image-20260519171205746](C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\image-20260519171205746.png)