week 13: for quiz

• Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet
• Cloud Computing- Basically a step on from Utility Computing
• platform - Internet infrastructure
• These platforms hide the complexity and details of the underlying infrastructure from users and applications by providing a very simple graphical interface or API
• Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources
• Rapid elasticity -You can go from 5 servers to 50 or from 50 servers to 5
• Measured service -You pay for what you use
• On-demand self-service - You get elasticity automatically
• Ubiquitous network access - You can access the cloud from anywhere
• Location-independent resource pooling -You work with virtual machines that could be hosted anywhere
• Data center - Facility used to house computer systems and associated components
• Mobile - SmartPhones, Tablets, Service Hubs
• Thin - No internal hard drives, lets servers do all work, displays info
• Thick - Laptops, desktop computers
• Data Center – facility used to housecomputer systems and associatedcomponents
• DISTRIBUTED SERVERS- Servers host the resources needed bycloud users
• Compute nodes- Provides CPU, Memory, Scratch Storage, andNetworking resources through virtualized interfaces
• Computer nodes- Hosts guest operating systems (Virtual Machines) using one or more VM hypervisors
• Compute nodes only provide temporary storage space for users/applications
• Storage nodes provide long term data storage solutions
• Storage nodes- Can be mapped to specific processes running on compute nodes, users, interface applications, etc
• Administrative nodes - Provides “hidden” back-end services such as resource load balancing, administrative/resource databases, security/firewalls, cloud macromanagement
• Public Cloud - Marketed based on resources offered, availability, security, price
• Local/Private Cloud -Cloud architectures tailored to an organization’s needs.
• Hybrid Cloud -Combination of public and local cloud resources.
• Machines in the cloud - Can I move my VM elsewhere?
• Databases in the cloud - Can I move my data elsewhere?
• Applications in the cloud - Can I run my application elsewhere?
• User mobility: User communicates "anytime", Anywhere, with anyone.
• Device Portability: Device can be connected anytime, anywhere to network
• Mobile computing systems are computing systems that may be easily moved physically and whose computing capabilities may be used while they are being moved
• MOBILE COMMUNICATION - Refers to the infrastructure put in place to ensure that seamless and reliable communication goes on
• MOBILE COMMUNICATION refers to a form of communications which does not depend on a physical connection between the sender and receiver. It facilitates the users to move from one physical location to another during communication.
• MOBILE HARDWARE - Includes mobile devices or device components that receive or access the service of mobility
• MOBILE SOFTWARE - The actual program that runs on the mobile hardware.
• mobile Software, most commonly referred to as an app, is a type of application software designed to run on a mobile device, such as a smartphone or tablet computer
• Mobile Software frequently serves to provide users with similar services to those accessed on PCs.