Also, in some environments, you can request a ca to generate a ca certificate for a self-signed certificate, which validates and resigns the previously generated certificate.
而且，在某些环境中，您可以请求CA为自签署的证书生成一张ca证书，这就确认并再签署了以前生成的证书。
The request and reply message types are self-explanatory, as they deal with the request and response interaction between client and server applications.
请求和应答消息类型是不言而喻的，因为它们处理客户端和服务器应用程序之间的请求和响应交互。
Your application must be available with some level of self-service sign-up, even if it is simply a request mechanism that results in a business process to add a tenant to the application.
应用程序必须具备某种程度的自助注册功能，即便仅仅是一种请求机制，即产生一种向应用程序添加租户的业务流程。
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