Cloud Computing Solutions. Группа авторов
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constrained, variable capacity links: Connecting wireless devices all together brings down connection limits compared with their wired alternative. Likewise, because of issues, for example, multi-access, fading, commotion and impedance conditions, the data transfer capacity of the remote connections can change discretionarily with time.
Energy constrained operation: The nodes in a MANET rely on battery power source. Mobile node batteries are small and normally store a very limited amount of energy. Inefficient network operations, such as routing, network initialization, etc., can rapidly drain batteries. In this situation, the most essential basic system paradigm should be vitality preservation.
Limited physical security: Mobile networks are prone to many more types of security threats than fixed networks, mainly due to wireless transmissions and collaborative routing. There are increased possibilities of eavesdropping, spoofing, and DOS attacks in these networks. Also, nodes are vulnerable to capture and compromise.
1.5 Summary
The basics of cloud computing have been described in this introductory chapter. The chapter began with a description of the evolution of cloud computing, including the historical advancement of cloud and how different computer systems are linked to form a cloud infrastructure. The concept of grid computing and its architecture and also cluster computing and its architecture were discussed. This chapter also presented a comparison-based study of cluster, grid and cloud, and concluded with a discussion of mobile computing.
EXERCISES
1 What is cloud computing? How do you differentiate it from internet computing?
2 Differentiate between a tightly coupled and a loosely coupled system with examples.
3 Define the cluster of computer environment. How can the cluster be used for high availability purposes?
4 What are the benefits of cloud computing?
5 What is a cloud?
6 Explain the architecture of the cluster of computers with neat sketches.
7 What is computer grid? How does the concept of grid computing mimic the electric grid?
8 Differentiate between distributed computing and peer-to-peer computing. What are the major challenges in distributed computing and peer-to-peer computing?
9 Explain how the grid computing environment is deployed.
10 What is mobile computing? Explain the three-tier structure of the mobile computing environment.
11 Briefly discuss the structure of mobile peer-to-peer computing. What are the characteristics of mobile peer-to-peer computing?
12 What is an ad-hoc network? Is it always mobile? Briefly discuss the major application of mobile ad-hoc network.
13 Which are the different layers that define cloud architecture?
14 What are the different data types used in cloud computing?
15 What are the different layers in cloud computing? Explain how they work.
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