If you also want to scan the User Datagram Protocol (UDP) ports, you must specify the -su options, as shown here in Listing 3.

如果您还希望扫描用户数据报协议(udp)端口，那么您必须指定- su选项，如清单3中所示。

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In this case, you can see that the Network file System (NFS) protocol is in the first file but not the second, while both the mysql and VNC ports have been open during the latter scan.

在这个示例中，您可以看到，在第一个文件中出现了网络文件系统(NFS)协议，在第二个文件中则没有出现，而在后面一次扫描期间，mysql和vnc端口都处于打开状态。

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This article gives a brief introduction to JTAG boundary scan basic protocol and describes in detail the structure, theory and algorithm of the system .

该文简述了边界扫描基本协议，详细介绍了本系统的结构和工作原理及其算法。

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