What is Service Oriented architecture?

What is Service Oriented architecture?

Service oriented architecture is based on services. Service is a unit of some task performed by a service provider in order to satisfy the consumer. Example of such a service is the web services used in .NET. Even though the main purpose of web services is to enable communication, it may differ from application to application. SOA provides a set of policies and frameworks to ensure the desired services are delivered to the consumer.
What is three tier architecture?
Three tier architecture typically consists of a client, server and “agent” between them. The agent is responsible for gathering the results and returning a single response to the agent....
Explain the situations you will use a Web Service and Remoting in projects.
Web services should be used if the application demands communication over a public network and require to work across multiple platforms...
Describe the .Net base class library - DOT.NET
The .NET Framework class library is a library of classes, interfaces, and value types....
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