[单选]

You are creating a Windows Communication Foundation (WCF) service. The service endpoints change frequently. On the service, you add a new ServiceDiscoveryBehavior to the Behaviors collection of the ServiceHost Description property. You need to ensure that client applications can communicate with the service and discover changes to the service endpoints.
What should you do?（）

Your network consists of an Active Directory forest that contains one domain. All domain controllers  run Windows  Server  2008  R2  and  are  configured  as  DNS  servers.  You  have  an  Active  Directory-integrated zone.   You have two Active Directory sites. Each site contains five domain controllers.   You add a new NS record to the zone.   You need to ensure that all domain controllers immediately receive the new NS record.   What should you do（） From the DNS Manager console， reload the zone.。 From the Services snap-in， restart the DNS Server service.。 From the command prompt， run repadmin /syncall.。 From the DNS Manager console， increase the version number of the SOA record.。 测定密度的水泥应预先通过0.9mm筛，在110℃±5℃温度下干燥1h后，冷却至室温。 锢囚锋 Which of the following three port types are valid Spanning Tree port types？（Choose the best threeanswers.）（） Designated port。 Nonswitch port。 Switch port。 Nonroot port。 Nondesignated port。 Root port。 什么是投影法？其分为哪几类？

You are creating a Windows Communication Foundation (WCF) service. The service endpoints change frequently. On the service, you add a new ServiceDiscoveryBehavior to the Behaviors collection of the ServiceHost Description property. You need to ensure that client applications can communicate with the service and discover changes to the service endpoints.
What should you do?（）