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單項選擇題

You are creating a Windows Communication Foundation (WCF) service based on WSHttpBinding. New audit requirements dictate that callers must be authenticated on every call to ensure that their credentials have not been revoked.You need to ensure that the service will not cache the security request token. What should you do?（）

A. Apply a ServiceBehavior attribute to the service implementation class with the lnstanceContextMode property set to Single.
B. In the message security configuration, change clientCredentialType from lssuedToken to UserName
C. In the message security configuration, set establishSecurityContext to false.
D. At the end of every operation, call the SessionStateUtility.RaiseSessionEnd method.

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單項選擇題

You are using Windows Communication Foundation (WCF) to create a service. You need to implement a custom message-level security binding element. Which binding element should you use?（）

A. Transport Security Binding Element
B. Https Transport Binding Element
C. Ssl Stream Secunty Binding Element
D. Windows Stream Security Binding Element

單項選擇題

A Windows Communication Foundation (WCF) service sends notifications when the service is started and stopped.You need to implement a client that logs these notifications. Which class should you use?（）

A. AnnouncementService
B. AnnouncementClient
C. DiscoveryClient
D. HttpListener