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You should consider the type of channel to use when configuring NET Remoting There are two types shipped with the NET Framework TCP and HTTP Performance is affected as follows: The HTTP protocol must negotiate connection information (host to host) in order to function This makes it a slower solution than using TCP The TCP channel provides the fastest throughput; however, it may not be the solution for network communication through firewalls Two types of formatters are provided with the NET Framework: the SOAP formatter and the binary formatter: The binary formatter is faster and more efficient because it uses a binary stream of data The SOAP formatter is slower since it has to handle the SOAP protocol Both formatters can be used over an HTTP channel, but for the best performance, use a binary formatter over a TCP channel Remember, though, there may be circumstances that make it impossible to use a TCP channel

pH = 314 + log(010) pH = 314 + ( 10) = 214 27 Answer: B The solubility equilibrium equation, ICE table, and solubility product constant are: CuSCN(s) Cu+(aq) + SCN (aq) Initial 0 0 Change +x +x Equilibrium x x Ksp = [Cu+][SCN ] = x2 16 10 11 = x2 40 10 6 M = x

In the next chapter, you will be looking at creating XML web services that allow remote objects to be hosted as web applications and allow communication using HTTP and SOAP protocols When considering whether to use NET Remoting over Web Services, consider the following: A NET Remoting server object can be hosted by any type of application Web Services need a web server, such as Internet Information Server XML web services are tied directly to HTTP and SOAP formatting This may not always be the best solution You must analyze the requirements fully before making the decision between NET Remoting and Web Services A NET Remoting server object can maintain state between method calls Having said all that, you might be wondering why you would ever use XML web services Well, hold on to your hats In the next chapter, you will see a lot of the complexity of remote objects eliminated through the use of Web Services You will also see that many solutions can take advantage of the HTTP and SOAP capabilities of Web Services The bottom line is that you must look at the user requirements thoroughly before making the decision If you need a flexible, fully controllable solution (one for which you can create your own plug-ins), then maybe NET Remoting is for you However, if your needs are for fast development over common platforms, then XML web services will be the right solution

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If you are asked on a Microsoft exam which technique to use, remember to examine the surrounding elements: What is the physical connection What protocols can be used How fine-tuned do the networking components have to be These are all questions that will help you in the final design decision

The following list will help when considering NET Remoting: A remoting host is needed on the remoting server in order to provide a runtime environment for your remote object This can be any application, such as a console application, web server, and so forth IIS can be the remoting host However, only objects using the HTTP channel can be used for IIS Either formatting option will work with IIS Configuration files can be changed without recompiling the components However, configuration can also be done programmatically This might create a more secure solution in some cases If configuration is done programmatically, then the component needs to be recompiled when the information changes Activation is the process that determines how and when remote objects are created PART V Server-activated objects have their lifetime controlled by the server When the client makes the first call, the object is activated SingleCall mode means that a new instance is given to each client requesting the object Singleton mode means that a single instance of the object is created, and every client communicates with that instance Client-activated objects have their lifetime controlled by the client The server object is created when the client creates the proxy Remotable objects must inherit from SystemMarshalByRefObject

Summary