Module 2 topic 1 - Module 2, Topic 1 page1/17 Module 2,...

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Module 2, Topic 1 page1/17 Module 2, Topic 1 - System Resources Return to List of Topics. Topics in this module: The advantages of the client-server approach . What is a server? What is a Client? Server hardware and software. . Desirable properties of servers. . How do servers achieve these goals? . Types of servers. Hardware Considerations for Servers. Server hardware components. Server operating systems. Client operating systems. Web Server Planning. Self Assessment Exercises 1. The advantages of the client-server approach Technical Advantages: Scalable : easy to increase or decrease storage and processing capabilities Open : may support many different types of platforms using different hardware and operating systems Reliable : consequences of machine "failure" not as severe as with centralized host-based processing because processing responsibility is spread over many computers. Business Advantage: Permits businesses to choose the best strategy to distribute functions depending upon the requirements of a particular application system. A disadvantage : Client-Server systems are very complex; software design and maintenance may be more difficult than with other approaches. An application system should be viewed as the machine (hardware and software), data, and human (people and procedures) elements that function together to meet some particular needs related to a business process.
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Module 2, Topic 1 page2/17 2. What is a server? A server is a computer or software package that provides services to clients. Usually, these services involve providing information to clients, they must be available when the client needs the service. Servers are usually dedicated (only used to serve PCs attached to the network). Non-dedicated servers may be used as a user's workstation at the same time it is serving to run other user's applications. 3. What is a Client? Clients are any computers that request and receive services from other computers on the network. They will embody these characteristics: The client software runs on the client platform. Client makes requests for services (such as obtaining data) Client provides the user interface. Client will use local processing of data and programs it receives from the server, particularly in the case of a file server. 4. Server hardware and software. The main differences between servers and clients are: CPU power and speed - file servers do not need much actual CPU power, but application and other types of server may need to be hugely powerful to effectively service the requests on a busy network. Clients in file servers need some local processing capacity to run applications on the client, but in other server types, where the processing is largely done by the server, very little client CPU capacity is required. MEMORY
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Module 2 topic 1 - Module 2, Topic 1 page1/17 Module 2,...

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