You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution.You have to have the Application Identifier of xxx stored in a DNS record.The Application Identifier is used for the federated trust.What actions must you take on the DNS？（） You must set up recipient filtering.。 You must set up a Host （A）.。 You must use a TXT record.。 You must use a Pointer （PTR） record.。 You must use a Mail exchange （MX） record.。
信息系统的操作包括哪些方面的操作？信息系统维护操作在信息系统运作中起什么作用？
屋面工程应根据建筑物的性质、重要程度、使用功能要求以及防水层合理使用年限，按不同等级进行设防，其中屋面Ⅲ级防水层，合理使用年限为（）年采用一道防水设防。 5。 10。 15。 25。
You have an Exchange Server 2010 organization named contoso.com. The organization contains two Client Access servers named CAS1 and CAS2 that are in a Client Accessserver array. All internal and external users connect to their mailboxes by using mail.contoso.com. You need to install a certificate on the Client Access servers to meet the following requirements：.Support 500 client computers that are not joined to the Active Directory domain .Support clients that use Microsoft Office Outlook in Cached Exchange Mode， Autodiscover， andExchange ActiveSync.Minimize client and user support costsWhat should you do？（） From a trusted third-party certification authority （CA），generate a certificate request that contains the mail.contoso.com and Autodiscover names.。 From a trusted third-party certification authority （CA），generate a certificate request that contains the CAS1.contoso.com and CAS2.contoso.com names.。 From an internal Active Directory-integrated certification authority （CA），generate a certificate request that contains the mail.contoso.com and Autodiscover names.。 From an internal Active Directory-integrated certification authority （CA），generate a certificate request that contains the CAS1.contoso.com and CAS2.contoso.com names.。
背对背信用证是指交易的一方开出第一张信用证，但暂不生效，需在对方开来一定金额的回头信用证经受益人表示接受时，才通知对方银行两证同时生效。
关于母子公司的关系的表述（）
