1 开发分布式应用的技术 the distributed application architecture
the distributed application architecture allows multiple users to access an application simultaneously over a network.In addition, each component of a distributed application functions separately and independently of the other components.( 每个组件的分布式应用程序功能单独和独立于其他组件) this increases the performance and scalability of the applition(这就增加了应用程序的性能和可伸缩性)
2应用架构三个层次(layer)的含义；三类分布式应用架构
presentation layer  business logic layer  data access layer
two-tier architecture  three-tier/n-tier architecture    service-oriented architecture
3六种COM+服务
just-in-time activation  role-based security    synchronization  object pooling transactions  queued components
4实现COM+服务涉及的基类
ApplicationAccessControlAttribute  ApplicationActivationAttribute  JustInTimeActivationAttribute  ObjectPoolingAttribute
SecureMethodAttribute  ServicedComponent  SharedProperty    TransactionAttribute
5通道注册使用哪个类 Channel registration using which class
ChannelServices.RegisterChannel(channel);
6注册远程对象的方法  Registration methods of remote objects
RegisterWellKnownServiceType  method
7 web服务特性  features of a  web service
interoperability  dynamic integration  industry standards  security
8什么是绑定；wsHTTPBinding的作用
Binding describes how a WCF service communicates with a client application
wsHTTPBinding is used for implementing features such as transactions,security,and reliable messaging .It uses WS-Reliable Messaging for reliable messaging and WS-Security for message security and authentication.This binding uses HTTP protocol for communication and the Text/XML message encoding to encode a message.
9五种契约及其定义 contract
service contract  acts as an entry point to access a WCF service
operation contract  is used to expose the operations that a service can perform.
data contract  is used to expose user-defined data types in a WCF service.
message contract  describes the structure of a message exchanged between a WCF service and a client application.
fault contract  enables you to send a customized error message to a client by creating a u
ser-defined class.
10托管WCF服务的四种方式hosting a wcf service
Self-Hosting a WCF service  Hosting a WCF service in IIS  Hosting a WCF service in Windows services 
Hosting a WCF service in WAS
11定义错误契约（FaultContract）的方法                     
[serviceContract]                                             
public interface IService {                                   
[OperationContract]
[FaultContract(typeof(MyFaultException))]
int Divide(int numerator,int denominator); }
[DataCOntract]
public class MyFaultException {
[DataMember]
public string message; }
12 swichValue属性作用
The switchValue attribute specifies the ammount and type of tracing information to be logged.
13四种跟踪源特点 trace sources
System.servicemodel:Logs all the processes,such as processing of a message,of a WCF service while the service communicates with a client application.
ssagelogging:Logs all messages that are sent andreceived by a WCF service.
System.IO.Log:Logs all the input and out information for a WCF service to the Common Log File System(CLFS)service fault
System.Runtime.Serualization: Logs the information such as the information related to the message that is serialized or deserailized,when an object of a WCF service is serialized and deserialized.
14序列化、反序列化、编码、解码的含义
序列化 Serialization is the process of converting objects and data into a common format for storage.
反序列化 The process of converting serialized and encoded objects and data back into the original format is known as deserialization.编码 encoding The process of converting the serialized data into a set of bytes is known an encoding
解码 used to convert objects and data into a common format for storage.
15四种WCF序列化类特点，默认的序列化类 （XmlSerializer）
DataContractserializer    NetDataContractSerializer  XmlSerializer    DataContractJsonSerializer
16 WCF编码类型  WCF encoding types
Text  Binary    MTOM    WebMessageEncoder
17操作行为特性（OperationBehavior Attribute）的两个属性(Property)含义
TransactionAutoComplete:Specifies that the current transaction will be completed automatically if no exception occurs during the transaction
TransactionScopeRequired:Specifies whether a method a method requires a transaction to be implemented
18支持可靠会话（reliable session）的默认内置绑定  a reliable session by default

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