[单选]

Look at the graphic below， the connectivity between Cisco IP phone access port and theworkstation CK-PC has been established， how to manage the traffic？（）

You are integrating a Windows Communication Foundation (WCF) service within an enterprise-wide Service Oriented Architecture (SOA).Your service has the following service contract: [ServiceContract]public class CreditCardConfirmationService { [OperationContract] boolean ConfirmCreditCard(string ccNumber); double OrderAmount(int orderNumber);} You need to allow the code in the ConfirmCreditCard method to participate automatically in existing transactions.If there is no existing transaction, a new transaction must be created automatically. What should you do?（） Inside the ConfirmCreditCard method, surround the code that must participate in the transaction with a using(new TransactionScope()) block.。 Inside the ConfirmCreditCard method, surround the code that must participate in the transaction with a using(new CommittableTransaction()) block.。 Add an [OperationBehavior(TransactionScopeRequired=true)] attribute to the ConfirmCreditCard method.。 Add an [OperationBehavior(TransactionAutoComplete=true)] attribute to the ConfirmCreditCard method.。 1岁左右婴儿会出现“分离痛苦”。 令牌总线网采用（）协议标准。 IEEE 802.3。 IEEE 802.5。 IEEE 802.4。 IEEE 802.6。 集体心理治疗 边增长边分配

Look at the graphic below， the connectivity between Cisco IP phone access port and theworkstation CK-PC has been established， how to manage the traffic？（）