Packet Tracer 是 Cisco 公司针对 CCNA 认证开发的一个用来设计、配置和故障排除网络的模拟软件。Packer Tracer 模拟器软件比 Boson 功能强大，比 Dynamips 操作简单，非常适合网络设备初学者使用。
学习任务
1、安装 Packer Tracer；2、利用一台型号为 2960 的交换机将 2pc 机互连组建一个小型局域网；3、分别设置 pc 机的 ip 地址；4、验证 pc 机间可以互通。
实验设备
Switch_2960 1 台；PC 2 台；直连线
PC1
IP：192.168.1.2
Submask：255.255.255.0
Gateway：192.168.1.1
PC2
IP：192.168.1.3
Submask：255.255.255.0
Gateway：192.168.1.1
PC1 ping PC2 Reply
PC2 ping PC1 Reply
PC2 ping Gateway Timeout
实战演练
PC1
ipconfig
IP Address......................: 192.168.1.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
ping 192.168.1.3
Pinging 192.168.1.3 with 32 bytes of data:
Reply from 192.168.1.3: bytes=32 time=50ms TTL=128
Reply from 192.168.1.3: bytes=32 time=8ms TTL=128
Reply from 192.168.1.3: bytes=32 time=10ms TTL=128
Reply from 192.168.1.3: bytes=32 time=11ms 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 = 8ms, Maximum = 50ms, Average = 19ms
PC2
ipconfig
IP Address......................: 192.168.1.3
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
ping 192.168.1.2
Pinging 192.168.1.2 with 32 bytes of data:
Reply from 192.168.1.2: bytes=32 time=11ms TTL=128
Reply from 192.168.1.2: bytes=32 time=10ms TTL=128
Reply from 192.168.1.2: bytes=32 time=11ms TTL=128
Reply from 192.168.1.2: bytes=32 time=11ms TTL=128
Ping statistics for 192.168.1.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 10ms, Maximum = 11ms, Average = 10ms
ping 192.168.1.1
Pinging 192.168.1.1 with 32 bytes of data:
Request timed out.
