[多选] Which of the following characteristics describe the BPDU Guard feature？（Choose all that apply.）（）

网络安全中的保密性是指网络信息不能被未经授权的用户改变的特性。 继发性人格异常 Windows Communication Foundation (WCF) service will be hosted in Microsoft Internet Information Services (IIS).You create a new application in IIS to host this service and copy the service DLL to the bin directory of the application.You need to complete the deployment of this service to IIS. What should you do next?（） Create an asmx file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.。 Create an .asmx file and add a @Register directive to this file. Copy the file to the bin directoyy of the application.。 Create a svc file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.。 Create a .svc file and add a @Register directive to this file. Copy the file to the bin directory of the application.。 简述结构化分析方法的基本手段和基本策略。 人身保险资金运用的原则？ Which of the following characteristics describe the BPDU Guard feature？（Choose all that apply.）（）