Chapter 6 ISM.pdf

Introduction to Cloud Computing ○ Cloud computing involves storing data on servers maintained by third parties. ○ It offers advantages such as not needing massive hardware drives or maintaining large databases personally. Historical Context Mainframes and Thin Clients ○ Mainframes w...

Introduction to Cloud Computing ○ Cloud computing involves storing data on servers maintained by third parties. ○ It offers advantages such as not needing massive hardware drives or maintaining large databases personally. Historical Context Mainframes and Thin Clients ○ Mainframes were large computers that handled all processing tasks. ○ Thin clients, or dummy terminals, were used to input requests to mainframes. Client-Server Era ○ Involved sharing processing power between standalone computers and servers. ○ Users could perform tasks on their computers but needed servers for specific functions like class registration. Cloud Computing Advantages ○ Allows data storage and processing to be handled externally. ○ Facilitates the Internet of Things (IoT) and smart devices. ○ Provides mobility by enabling data access from anywhere with internet connectivity. Key Concepts in Cloud Computing Definitions ○ Cloud Computing: Applications and services running on a distributed network using virtualized resources. ○ Distributed Network: Allows multiple users to access and communicate with data.  ○ Virtualization: Software mimics hardware functions, allowing multiple operating systems on a single machine. Elastic Leasing ○ Elastic: The ability to expand resources as needed, avoiding over or under-provisioning. ○ Pooled Resources: Sharing server space with others, reducing costs through economies of scale. Security in Cloud Computing Encryption ○ Protects communication by encoding messages so only intended recipients can read them. Firewalls ○ Limit access to networks, acting as barriers to unauthorized users. Virtual Private Networks (VPNs) ○ Create secure, private connections over public networks, often used for accessing sensitive data remotely. Types of Cloud Services Infrastructure as a Service (IaaS) ○ Provides basic storage space without additional features. Platform as a Service (PaaS)  ○ Offers a platform allowing users to develop, run, and manage applications without dealing with infrastructure. Software as a Service (SaaS) ○ Delivers software applications over the internet, eliminating the need for local installation. Considerations for Cloud Usage ○ Security Concerns: Some industries require in-house data management for security reasons. ○ Cost and Scalability: Cloud services offer cost-effective and scalable solutions for businesses. ○ Legal and Competitive Risks: Sensitive data or proprietary information may necessitate private servers. Networking Basics Types of Networks ○ Local Area Network (LAN): Confined to a specific location, using MAC addresses for communication. ○ Wide Area Network (WAN): Covers larger geographic areas, using IP addresses for communication. ○ Internet: A global network of interconnected networks. Importance of Networking ○ Facilitates rapid communication and resource sharing. ○ Essential for modern business operations and personal connectivity. Conclusion ○ Cloud computing has revolutionized data storage and processing, offering flexibility, scalability, and cost savings. ○ Understanding the types of cloud services and security measures is crucial for leveraging cloud technology effectively.