establish a communication channel from the CES, via the International Telex Network to the final destination
set up a communication channel from your SES, via a satellite, to a CES within your ocean region
set up a channel directly to the addressee at the destination
establish a channel from your terminal , via the International Telex Network to a CES within your ocean region
第1题：
You are developing a Windows Communication Foundation (WCF) service. Client applications require reliable sessions to access the service.Users report that they receive ServerTooBusyException errors when their client application tries to establish a session. You need to ensure that the service can handle a minimum of 30 client connection requests.Which ReliableSessionBindingElement property should you configure?（）
A. MaxRetryCount
B. MaxTransferWindowSize
C. MaxPendingChannels
D. InactivityTimeout
第2题：
You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel.You find that operations do not start until all previous operations have finished. The service hosting code contains the following lines.var service = new WarehouseService(); var host = new ServiceHost(service);You need to ensure that new operations do not wait for previous operations to finish.Which attribute should you use to decorate the service?（）
A. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Multiple)]
B. [CallbackBehavior(ConcurrencyMode=ConcurrencyMode.Multiple)]
C. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Single)]
D. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Reentrant)]
第3题：
A.Establish Cause
B.LAC&CI
C.Random Reference
D.TA
E.IMSIorTMSI
第4题：
Most IP layer-based proxy mechanisms，such as network address translation (NAT)，only supportuni-directional proxy，from the internal network to external network(the Interned．The proxvestablishes the communication channel by (71) IP addresses．The IP addresses must be (72) ．These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels，such as，multimedia applications．IP layer-based proxy mechanisms need additional software (73) for each application that uses (74) channels． SOCKS identifies communication targets through domain names，overcoming the restriction of Usina private IP addresses．SOCKS can use domain names to establish communication between separate LANs，with (75) IP addresses．
(66)
A．manufacturing
B．manipulating
C．conduct
D．implement
第5题：
A Windows Communication Foundation (WCF) service is required to log all authorization attempts to the Windows Event Log. You need to configure a behavior and apply it to the service to support this requirement. Which behavior should you configure and apply?（）
A. service Authentication Manager
B. service Authorization
C. service Credentials
D. service Security Audit
第6题：
You are creating an application that consumes a Windows Communication Foundation (WCF) service. The service implements the IService contract. The client application contains the CallbackHandler class, which implements IServiceCallback.You need to ensure that a client proxy is created that can communicate with the service over a duplex channel.Which code segment should you use?（）
A.
B.
C.
D.
第7题：
You are developing a Windows Communication Foundation (WCF) service. You establish that the largest size of valid messages is 8,000 bytes. You notice that many malformed messages are being transmitted.Detailed information about whether each message is malformed must be logged.You need to ensure that this information is saved in XML format so that it can be easily analyzed.What should you add to the service configuration file?（）
A.
B.
C.
D.
第8题：
You are developing a Windows Service. The Windows Service will host a Windows Communication Foundation (WCF) service.The Windows Service class will inherit from ServiceBase.You need to ensure that the WCF service starts when the Windows Service is restarted.What should you do in the Windows Service class?（）
A.
B.
C.
D.
第9题：
Windows Communication Foundation (WCF) service is self-hosted in a console application. The service implements the lTimeService service interface in the TimeService class.You need to configure the service endpoint for HTTP communication. How should you define the service and endpoint tags?（）
A.
B.
C.
D.
第10题：
A. Each B channel can transmit up to 64 kbps
B. The ISDN B channel carries voice or data
C. The ISDN D channel transmits control information.
D. The D channel transmission rate varies depending on the service used.
E. HDLC or PPP can be used to encapsulate D channel information.