Your company has two servers that run Windows Server 2008 named Server2 and Server3， Both servers have the DNS server role installed. Server3 is configured to forward all DNS requests to Server2. You update a DNS record on Server2. You need to ensure that Server3 is able to immediately resolve the updated DNS record. What should you do？（） Run the dnscmd /clearcache on Server3。 Run the ipconfig /flushdns command on Server3。 Decrease the Time-to-Live （TTL） on the Start of Authority （SOA） record of na.contoso.com to 15minutes。 Increase the Retry Interval value on the Start of Authority （SOA） record of na.contoso.com to 15 minutes.。
集群的生态学意义主要有（）、（）、（）。
You want users to log on to Active Directory by using a new Principal Name （UPN）. You need to modify the UPN suffix for all user accounts. Which tool should you use（） Dsmod。 Netdom。 Redirusr。 Active Directory Domains and Trust。
无效婚姻
A Windows Communication Foundation (WCF) service listens for messages at net.tcp://www.contoso.com/MyService.It has a logical address at http://www.contoso.com/MyService. The configuration for the WCF client is as follows:The generated configuration does not provide enough information for the client to communicate with the server.You need to update the client so that it can communicate with the server. What should you do?（） In the client configuration, change the value of the address attribute to net.tcp://www.contoso.com/MyService。 In the client configuration, change the value of the address attribute to net.tcp://www.contoso.com/MyService listen=http://www.contoso.com/MyService.。 After instantiating the client and before invoking any service operation, add this line of code. EndpointBehaviors.Add(new EndpointDiscoveryBehavior(){ Enabled = true });。 After instantiating the client and before invoking any service operation, add this line of code. client.Endpoint.Behaviors.Add(new ClientViaBehavior(new Uri("net.tcp://www.contoso.com/IMyService")))。
带裙房的高层建筑下的大面积整体筏形基础，其主楼与相邻的裙房柱的差异沉降不应大于跨度的（）。
