Software Engineering (10th Edition)
Software Engineering (10th Edition)
10th Edition
ISBN: 9780133943030
Author: Ian Sommerville
Publisher: PEARSON
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Chapter 18, Problem 18.1E

Explanation of Solution

Distinctions between Services and software components:

Some of the critical distinctions between services and software components are represented in the below table:

ServicesSoftware Components
Services should be independent and loosely coupled.Software components should not be independent and loosely coupled.
The interface of services is a “provides” interface that allows accesses to the service functionality. However services do not have a “requires” interface as services are intended to be independent and usable in different context.Software components have two related interfaces- “provides” interface and “requires” interface.
Services communicate by exchanging messages, expressed in XML, and these messages are distributed using standard messaging transport protocols such as http and TCP/IP.Software components can be independently deployed and composed without modification.
As there is a single strand of services against several competing standards of components, service inter-operability is much better than components.As there are several competing standards of components against a single strand of services against, components inter-operability is much poorer than services.

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