导水机构安装主要技术要求有哪些？
You develop a Web application that writes data to a file on a server. You restrict access to the file to specific Windows users. The Web application runs as CONTOSO\ASPNET. You deny anonymous access to the application in IIS. You add the following XML segment in the Web.config file.You need to ensure that the application meets the following requirements:It must impersonate the user when it writes data to the file.It must run as CONTOSO\ASPNET when a user does not access the file. Which two actions should you perform? （） [" Use the following XML segment in the Web.config file. <identity impersonate="false"\/>"," Use the following XML segment in the Web.config file. <identity impersonate="true"\/>"," Use the following code segment to access the file. Dim wp As WindowsPrincipal = _CType(HttpContext.Current.User, WindowsPrincipal) Dim wi As WindowsIdentity = WindowsIdentity.GetCurrent() Dim wic As WindowsImpersonationContext = wi.Impersonate()' Access the file herewic.Undo()"," Use the following code segment to access the file. Dim wi As WindowsIdentity = WindowsIdentity.GetCurrent()Dim wic As WindowsImpersonationContext = _WindowsIdentity.Impersonate(wi.Token)' Access the file herewic.Undo()"]
什么是IP子网，请简述IP子网划分的作用 。
论述知识学习的作用？
管理信息系统按照核心业务活动分类可分为电子业务系统、电子政务系统和（）
构成数据流图的主要成分有哪些？
