因为HTTP是无状态的，除非一些类型的会话令牌在每个请求中来回传递，否则服务器并不能将同一个人的所有请求联系在一起。
Because HTTP is stateless, unless some kind of session token is passed back and forth on every request, the server has no way to link together requests made by the same person.
生成一个安全会话令牌的能力，WebSphere DataPower和Microsoft WCF客户机可以使用该令牌来保护消息交换。
Ability to generate a secure conversation token that WebSphere DataPower and the Microsoft WCF client can use to secure the messages exchanged.
获取或设置已与服务器建立的并发安全会话的最大数目，该服务器已经为这些会话颁发会话令牌但尚未为这些会话发送任何应用程序消息。
Gets or sets the maximum number of concurrent security sessions that are established with the server for which it has issued a session token but for which no application messages are sent.
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