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@@ -0,0 +1,140 @@
+## 作业:
+
+#### Router1:
+
+```
+Router>en
+Router#conf t
+Enter configuration commands, one per line.  End with CNTL/Z.
+Router(config)#int f0/0
+Router(config-if)#ip add
+Router(config-if)#ip address 192.168.3.1 255.255.255.0
+Router(config-if)#no shut
+Router(config-if)#no shutdown 
+
+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)#ex
+Router(config)#int s0/0/0
+Router(config-if)#ip add
+Router(config-if)#ip address 10.0.0.2 255.255.255.0
+Router(config-if)#no shut
+Router(config-if)#no shutdown 
+
+%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
+Router(config-if)#ex
+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
+```
+
+#### Router0:
+
+```
+Router>en
+Router#conf t
+Enter configuration commands, one per line.  End with CNTL/Z.
+Router(config)#int f0/0
+Router(config-if)#ip add
+Router(config-if)#ip address 192.168.1.1 255.255.255.0
+Router(config-if)#no shut
+Router(config-if)#no shutdown 
+
+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)#ex
+Router(config)#int f0/1
+Router(config-if)#ip add
+Router(config-if)#ip address 192.168.2.1 255.255.255.0
+Router(config-if)#no shut
+Router(config-if)#no shutdown 
+
+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)#ex
+Router(config)#int s0/0/0
+Router(config-if)#ip add
+Router(config-if)#ip address 10.0.0.1 255.255.255.0
+Router(config-if)#no shut
+Router(config-if)#no shutdown 
+
+Router(config-if)#
+%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up
+
+Router(config-if)#ex
+Router(config)#
+%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
+
+Router(config)#ip route 192.168.3.0 255.255.255.0 10.0.0.2
+Router(config)#service dhcp
+Router(config)#ip dhcp pool czl
+Router(dhcp-config)#net
+Router(dhcp-config)#network 192.168.1.0 255.255.255.0
+Router(dhcp-config)#defa
+Router(dhcp-config)#default-router 192.168.1.1
+Router(dhcp-config)#ex
+Router(config)#ser
+Router(config)#service dh
+Router(config)#service dhcp 
+Router(config)#ip dhcp pool xc
+Router(dhcp-config)#net
+Router(dhcp-config)#network 192.168.2.0 255.255.255.0
+Router(dhcp-config)#de
+Router(dhcp-config)#default-router 192.168.2.1
+Router(dhcp-config)#ex
+Router(config)#
+Router(config)#int f0/0
+Router(config-if)#ip helper
+Router(config-if)#ip helper-address 192.168.3.2
+Router(config-if)#ex
+Router(config)#int f0/1
+Router(config-if)#ip hel
+Router(config-if)#ip helper
+Router(config-if)#ip helper-address 192.168.3.2
+Router(config-if)#ex
+Router(config)#
+```
+
+#### PC0:
+
+```
+Packet Tracer PC Command Line 1.0
+C:\>ping 192.168.1.3
+
+Pinging 192.168.1.3 with 32 bytes of data:
+
+Reply from 192.168.1.3: bytes=32 time<1ms TTL=128
+Reply from 192.168.1.3: bytes=32 time<1ms TTL=128
+Reply from 192.168.1.3: bytes=32 time<1ms TTL=128
+Reply from 192.168.1.3: bytes=32 time<1ms TTL=128
+
+Ping statistics for 192.168.1.3:
+    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
+Approximate round trip times in milli-seconds:
+    Minimum = 0ms, Maximum = 0ms, Average = 0ms
+
+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
+```
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