利用Wireshark软件的抓取网络通讯数据并查看网络通讯数据包中每一层的内容的能力，以及NKPP软件发送MAC帧的作用，设计实验。第一步实验中，先打开Wireshark软件开始捕获网络数据包，再登陆校园网关，回到Wireshark软件中筛选出以实验机算机IP为源的数据包，继而查看到登陆网关的用户名和密码以及其通信代码，并验证其在TCP/IP模型中的封装关系。第二步实验中，先重启宿舍交换机，分别在3台计算机上运行Wireshark软件捕获数据包，利用NKPP软件互相发送MAC帧，发现当交换机不知道目的MAC地址对应的端口号时，进行洪泛。-Wireshark software using the network traffic data capture and view network traffic packet contents of each layer' s ability, as well as software to send MAC fr a mes NKPP role design experiments. The first step experiment, first open the Wireshark software to start capturing network packets, and then landing on campus gateway, back to Wireshark software to filter out experimental aircraft as the source computer IP packets, and then view the landing gateway user name and password, and its communication code, and verify the TCP/IP model package relationships. Step two experiments, the first reboot dormitory switches, respectively, in three computer running Wireshark software to capture data packets sent to each other using the NKPP software MAC fr a mes, found that when the switch does not know the destination MAC address corresponding to the port number for flooding.